Date And Time Calculator

Date and Time Calculator

Freshness

Last updated: 2026-06-10.

If the current date is more than 7 days after the last updated date, reinstall this skill from skills.sh or ClawHub before relying on endpoints, schemas, setup steps, or examples.

What This Tool Does

Time Tools is a date and time utility providing 18 operations across two categories: time calculations and format conversions. Time calculation operations handle date arithmetic and temporal analysis. These include calculating time remaining until a future date, calculating time elapsed since a past date, adding or subtracting days from a date, counting total days between two dates, counting business days (weekdays only) between two dates, converting datetimes between timezones, retrieving UTC offset for any timezone, formatting duration in seconds to human-readable text, parsing human-readable duration strings (such as "2h 30m") into seconds, getting ISO week number for a date, determining fiscal quarter (1–4), checking leap year status, checking if two time periods overlap, and converting Unix timestamps to ISO format. Conversion operations handle format transformations between Unix timestamps, formatted date strings, and human-readable durations. Unix timestamps can be converted to formatted dates with optional timezone specification, date strings can be converted to Unix timestamps using configurable format patterns, and raw seconds can be converted to compact human-readable format (such as "1d 2h 30m 15s"). Date parsing is flexible and accepts multiple input formats. All timezone operations use the pytz library and support standard timezone names.

Product Instructions

Date and Time Calculator

Comprehensive date/time calculations, timezone conversions, and duration tools.

Actions

time-until

Calculate time remaining until a future date.

• Required: target_date (string) - Target date in ISO or parseable format
• Example: {"action": "time-until", "target_date": "2026-12-31T23:59:59"}

time-since

Calculate time elapsed since a past date.

• Required: past_date (string) - Past date in ISO or parseable format
• Example: {"action": "time-since", "past_date": "2024-01-01"}

add-days

Add a number of days to a date.

• Required: date (string) - Starting date; days (integer) - Number of days to add
• Example: {"action": "add-days", "date": "2026-03-10", "days": 30}

subtract-days

Subtract a number of days from a date.

• Required: date (string) - Starting date; days (integer) - Number of days to subtract
• Example: {"action": "subtract-days", "date": "2026-03-10", "days": 14}

add-hours

Add hours to a datetime.

• Required: date (string) - Starting datetime; hours (number) - Hours to add
• Example: {"action": "add-hours", "date": "2026-03-10T09:00:00", "hours": 5.5}

subtract-hours

Subtract hours from a datetime.

• Required: date (string) - Starting datetime; hours (number) - Hours to subtract
• Example: {"action": "subtract-hours", "date": "2026-03-10T17:00:00", "hours": 3}

add-minutes

Add minutes to a datetime.

• Required: date (string) - Starting datetime; minutes (number) - Minutes to add
• Example: {"action": "add-minutes", "date": "2026-03-10T09:00:00", "minutes": 45}

subtract-minutes

Subtract minutes from a datetime.

• Required: date (string) - Starting datetime; minutes (number) - Minutes to subtract
• Example: {"action": "subtract-minutes", "date": "2026-03-10T10:30:00", "minutes": 15}

days-between

Calculate the number of calendar days between two dates.

• Required: start_date (string) - Start date; end_date (string) - End date
• Example: {"action": "days-between", "start_date": "2026-01-01", "end_date": "2026-12-31"}

business-days-between

Calculate the number of business days (weekdays only, Mon-Fri) between two dates.

• Required: start_date (string) - Start date; end_date (string) - End date
• Example: {"action": "business-days-between", "start_date": "2026-03-01", "end_date": "2026-03-31"}

convert-timezone

Convert a datetime from one timezone to another.

• Required: date_string (string) - Datetime to convert; from_timezone (string) - Source timezone; to_timezone (string) - Target timezone
• Example: {"action": "convert-timezone", "date_string": "2026-03-10 09:00:00", "from_timezone": "America/New_York", "to_timezone": "Europe/London"}

timezone-offset

Get the current UTC offset for a timezone.

• Required: timezone (string) - Timezone name (e.g., "America/New_York", "Europe/London", "Asia/Tokyo")
• Example: {"action": "timezone-offset", "timezone": "America/Los_Angeles"}

format-duration

Format a number of seconds into human-readable text (e.g., "2 days, 3 hours, 15 minutes").

• Required: seconds (number) - Duration in seconds
• Example: {"action": "format-duration", "seconds": 90061}

parse-duration

Parse a human-readable duration string into total seconds. Supports units: s/sec/seconds, m/min/minutes, h/hr/hours, d/day/days.

• Required: duration_str (string) - Duration text to parse
• Example: {"action": "parse-duration", "duration_str": "2h 30m 15s"}

week-number

Get the ISO week number (1-53) for a date.

• Required: date (string) - Date to check
• Example: {"action": "week-number", "date": "2026-03-10"}

quarter

Get the fiscal quarter (1-4) for a date.

• Required: date (string) - Date to check
• Example: {"action": "quarter", "date": "2026-08-15"}

is-leap-year

Check whether a given year is a leap year.

• Required: year (integer) - Year to check (minimum: 1)
• Example: {"action": "is-leap-year", "year": 2028}

working-hours-overlap

Check whether two time periods overlap (useful for scheduling across time zones).

• Required: start1 (string) - Start of first period (HH:MM); end1 (string) - End of first period (HH:MM); start2 (string) - Start of second period (HH:MM); end2 (string) - End of second period (HH:MM)
• Example: {"action": "working-hours-overlap", "start1": "09:00", "end1": "17:00", "start2": "14:00", "end2": "22:00"}

unix-to-iso

Convert a Unix timestamp to ISO 8601 format.

• Required: timestamp (number) - Unix timestamp in seconds
• Example: {"action": "unix-to-iso", "timestamp": 1773331200}

unix-to-date

Convert a Unix timestamp to a formatted date string, optionally in a specific timezone.

• Required: timestamp (number) - Unix timestamp in seconds
• Optional: timezone (string) - Timezone name (defaults to local time)
• Example: {"action": "unix-to-date", "timestamp": 1773331200, "timezone": "America/Chicago"}

date-to-unix

Convert a date string to a Unix timestamp.

• Required: date_string (string) - Date string to convert
• Optional: format (string) - Date format pattern (default: "%Y-%m-%d %H:%M:%S")
• Example: {"action": "date-to-unix", "date_string": "2026-03-10 12:00:00"}

seconds-to-human

Convert seconds to a compact human-readable format (e.g., "1d 2h 30m 15s").

• Required: seconds (number) - Number of seconds
• Example: {"action": "seconds-to-human", "seconds": 95415}

Common Workflows

Project deadline countdown: Use time-until with the deadline date to show remaining time, then business-days-between to count working days left.

Meeting scheduling across time zones: Use convert-timezone to align meeting times, then working-hours-overlap to confirm both parties are within work hours.

Date arithmetic for invoicing: Use add-days to compute due dates (e.g., Net 30), or subtract-days to find a billing period start.

Log timestamp conversion: Use unix-to-iso or unix-to-date to convert raw timestamps into readable dates, or date-to-unix to convert back.

Important Notes

• Dates accept ISO 8601 format or most common parseable formats (e.g., "March 10, 2026", "2026-03-10", "10/03/2026").
• Timezone names use the IANA database (e.g., "America/New_York", "Europe/London", "Asia/Tokyo", "UTC").
• business-days-between counts weekdays only (Monday through Friday) and does not account for public holidays.
• format-duration produces verbose output ("2 days, 3 hours") while seconds-to-human produces compact output ("2d 3h").
• parse-duration supports flexible input: "2h 30m", "5 days 3 hours", "90s", etc.

When To Use

• Use this skill for Date and Time Calculator on AgentPMT.
• Use it when an agent needs this specific tool's behavior, schema, inputs, outputs, and invocation shape.
• Search and activation keywords: date and time calculator, date calculator and timestamp tool set, building countdown timers for events or deadlines, calculating project durations in business days excluding weekends, scheduling meetings across multiple timezones, converting api timestamps to human readable formats, add days, date.
• Supported action names: add-days, add-hours, add-minutes, business-days-between, convert-timezone, date-to-unix, days-between, format-duration, is-leap-year, parse-duration, quarter, seconds-to-human, subtract-days, subtract-hours, subtract-minutes, time-since, time-until, timezone-offset, unix-to-date, unix-to-iso, week-number, working-hours-overlap.

Use Cases

• Building countdown timers for events or deadlines
• calculating project durations in business days excluding weekends
• scheduling meetings across multiple timezones
• converting API timestamps to human-readable formats
• parsing user-entered durations like "2 hours 30 minutes" into seconds
• determining fiscal quarters for financial reporting
• validating date ranges for booking systems
• checking working hours overlap between distributed teams
• generating relative timestamps for activity feeds
• calculating age or tenure from start dates
• converting between Unix epoch and display formats for logs
• determining week numbers for sprint planning
• building time-tracking applications
• validating leap years for date calculations
• formatting elapsed time for dashboards and reports.

Categories And Industries

No categories or industry tags are published for this tool.

Actions And Schema

Complete generated action schema: ./schema.md. Supported action count: 22. x402 availability: not enabled for this product.

• add-days (action slug: add-days): Add a number of days to a date. Returns the resulting date in ISO format. Price: 5 credits. Parameters: date, days.
• add-hours (action slug: add-hours): Add hours to a datetime. Returns the resulting datetime in ISO format. Price: 5 credits. Parameters: date, hours.
• add-minutes (action slug: add-minutes): Add minutes to a datetime. Returns the resulting datetime in ISO format. Price: 5 credits. Parameters: date, minutes.
• business-days-between (action slug: business-days-between): Calculate the number of business days (weekdays only, Mon-Fri) between two dates. Does not account for public holidays. Price: 5 credits. Parameters: end_date, start_date.
• convert-timezone (action slug: convert-timezone): Convert a datetime from one timezone to another. Uses IANA timezone names. Price: 5 credits. Parameters: date_string, from_timezone, to_timezone.
• date-to-unix (action slug: date-to-unix): Convert a date string to a Unix timestamp. Price: 5 credits. Parameters: date_format, date_string.
• days-between (action slug: days-between): Calculate the number of calendar days between two dates. Price: 5 credits. Parameters: end_date, start_date.
• format-duration (action slug: format-duration): Format a number of seconds into human-readable text (e.g., '2 days, 3 hours, 15 minutes'). Price: 5 credits. Parameters: seconds.
• is-leap-year (action slug: is-leap-year): Check whether a given year is a leap year. Price: 5 credits. Parameters: year.
• parse-duration (action slug: parse-duration): Parse a human-readable duration string into total seconds. Supports s/sec/seconds, m/min/minutes, h/hr/hours, d/day/days. Price: 5 credits. Parameters: duration_str.
• quarter (action slug: quarter): Get the fiscal quarter (1-4) for a date. Price: 5 credits. Parameters: date.
• seconds-to-human (action slug: seconds-to-human): Convert seconds to compact human-readable format (e.g., '1d 2h 30m 15s'). Price: 5 credits. Parameters: seconds.
• subtract-days (action slug: subtract-days): Subtract a number of days from a date. Returns the resulting date in ISO format. Price: 5 credits. Parameters: date, days.
• subtract-hours (action slug: subtract-hours): Subtract hours from a datetime. Returns the resulting datetime in ISO format. Price: 5 credits. Parameters: date, hours.
• subtract-minutes (action slug: subtract-minutes): Subtract minutes from a datetime. Returns the resulting datetime in ISO format. Price: 5 credits. Parameters: date, minutes.
• time-since (action slug: time-since): Calculate time elapsed since a past date. Returns days, hours, minutes, seconds. Price: 5 credits. Parameters: past_date.
• time-until (action slug: time-until): Calculate time remaining until a future date. Returns days, hours, minutes, seconds. Price: 5 credits. Parameters: target_date.
• timezone-offset (action slug: timezone-offset): Get the current UTC offset for a timezone. Price: 5 credits. Parameters: timezone.
• unix-to-date (action slug: unix-to-date): Convert a Unix timestamp to a formatted date string, optionally in a specific timezone. Price: 5 credits. Parameters: timestamp, timezone.
• unix-to-iso (action slug: unix-to-iso): Convert a Unix timestamp to ISO 8601 format. Price: 5 credits. Parameters: timestamp.
• week-number (action slug: week-number): Get the ISO week number (1-53) for a date. Price: 5 credits. Parameters: date.
• working-hours-overlap (action slug: working-hours-overlap): Check whether two time periods overlap. Useful for scheduling across time zones. Price: 5 credits. Parameters: end1, end2, start1, start2.

Live Schema And Examples

Use the compact schema above for ordinary calls. Before a new production integration, or whenever parameters, enum values, nested objects, outputs, or examples are unclear, fetch live details first.

• Exact schema: call agentpmt-tool-search-and-execution with action: "get_schema", and tool_id: "date-calculator-and-timestamp-tool-set".
• Detailed examples: call agentpmt-tool-search-and-execution with action: "get_instructions" and tool_id: "date-calculator-and-timestamp-tool-set", or call this product with action: "get_instructions" when the product tool is already selected.
• Treat returned live schema and instructions as more specific than this generated summary.

MCP schema lookup through the main AgentPMT MCP server:

{
  "method": "tools/call",
  "params": {
    "name": "AgentPMT-Tool-Search-and-Execution",
    "arguments": {
      "action": "get_schema",
      "tool_id": "date-calculator-and-timestamp-tool-set"
    }
  }
}

For live examples, keep the same MCP tool and use these arguments:

{
  "action": "get_instructions",
  "tool_id": "date-calculator-and-timestamp-tool-set"
}

Authenticated AgentPMT REST schema lookup body:

{
  "name": "agentpmt-tool-search-and-execution",
  "parameters": {
    "action": "get_schema",
    "tool_id": "date-calculator-and-timestamp-tool-set"
  }
}

Authenticated AgentPMT REST live examples body:

{
  "name": "agentpmt-tool-search-and-execution",
  "parameters": {
    "action": "get_instructions",
    "tool_id": "date-calculator-and-timestamp-tool-set"
  }
}

Call This Tool

Product slug: date-calculator-and-timestamp-tool-set

Marketplace page: https://www.agentpmt.com/marketplace/date-calculator-and-timestamp-tool-set

• AgentPMT account route: first use ../agentpmt-account-mcp-rest-api-setup to connect the main MCP server or REST API for an Agent Group where this tool is enabled.
• x402 route: not enabled for this product.
• AgentPMT overview: use ../what-is-agentpmt for marketplace, Agent Group, workflow, MCP, REST, and payment concepts.

If those setup skills are not installed beside this product skill, use the downloads below.

Core AgentPMT setup skills:

• What AgentPMT is: ../what-is-agentpmt
  • ClawHub page: https://clawhub.ai/agentpmt/what-is-agentpmt
  • OpenClaw install: openclaw skills install what-is-agentpmt
  • skills.sh install: npx skills add AgentPMT/agent-skills --skill what-is-agentpmt
• AgentPMT account MCP/REST setup: ../agentpmt-account-mcp-rest-api-setup
  • ClawHub page: https://clawhub.ai/agentpmt/agentpmt-account-mcp-rest-api-setup
  • OpenClaw install: openclaw skills install agentpmt-account-mcp-rest-api-setup
  • skills.sh install: npx skills add AgentPMT/agent-skills --skill agentpmt-account-mcp-rest-api-setup

skills.sh install script:

npx skills add AgentPMT/agent-skills --skill what-is-agentpmt
npx skills add AgentPMT/agent-skills --skill agentpmt-account-mcp-rest-api-setup

MCP call shape after the main AgentPMT MCP server is connected:

{
  "method": "tools/call",
  "params": {
    "name": "Date-and-Time-Calculator",
    "arguments": {
      "action": "add-days",
      "date": "example date",
      "days": 1
    }
  }
}

Use the exact tool name returned by tools/list; the name above is the expected readable form.

Authenticated AgentPMT REST call body:

{
  "name": "date-calculator-and-timestamp-tool-set",
  "parameters": {
    "action": "add-days",
    "date": "example date",
    "days": 1
  }
}

Use the setup skill for the account connection details before making REST calls.

Response Handling

• Treat the returned JSON as the source of truth for this tool call.
• If the response includes warnings or correction targets, apply them before retrying.
• If the response includes a passed or success-style boolean, use it as the workflow gate.
• If validation fails or the response shape is unclear, call get_schema or get_instructions before retrying.
• If add-days fails, preserve the request parameters and retry only after fixing schema, auth, or payment errors.

Security

• Do not place account secrets, wallet private keys, mnemonics, signatures, or payment headers in prompts or logs.
• Keep tool inputs scoped to the minimum content needed for the task.
• Use the setup skills for credential handling; this product skill only defines product-specific behavior.

AgentPMT Reference

• What AgentPMT is: ../what-is-agentpmt (ClawHub: what-is-agentpmt, page: https://clawhub.ai/agentpmt/what-is-agentpmt; skills.sh: npx skills add AgentPMT/agent-skills --skill what-is-agentpmt)
• AgentPMT account MCP/REST setup: ../agentpmt-account-mcp-rest-api-setup (ClawHub: agentpmt-account-mcp-rest-api-setup, page: https://clawhub.ai/agentpmt/agentpmt-account-mcp-rest-api-setup; skills.sh: npx skills add AgentPMT/agent-skills --skill agentpmt-account-mcp-rest-api-setup)
• Marketplace product: https://www.agentpmt.com/marketplace/date-calculator-and-timestamp-tool-set
• AgentPMT main MCP server: https://api.agentpmt.com/mcp/
• AgentPMT REST invoke endpoint: https://api.agentpmt.com/products/purchase