How do I install the Reverse Month skill?

Run npx skillmds@latest add diegosouzapw/reverse-month in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Reverse Month safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Reverse Month?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Reverse Month free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Reverse Month?

diegosouzapw (@diegosouzapw) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Reverse Month by diegosouzapw — Agent Skill

Name: Reverse Month
Rating: 4.2 (5 reviews)
Author: diegosouzapw

Reverse Month

Convert dates from various formats to "reverse month" format (YYYY-MM), which is the ISO date format containing only the year and month components. Use when users need to extract year-month from dates, standardize month formats, or prepare dates for monthly aggregations and reporting.

diegosouzapw Updated Sep 8, 2026 54 repo stars

File contents

Reverse Month Converter

Overview

Convert dates from various human-readable formats into standardized "reverse month" format (YYYY-MM). This skill handles flexible date input parsing and provides consistent, machine-readable month output by extracting only the year and month components from a full date.

The reverse month format is the year and month portion of an ISO date (YYYY-MM), making it ideal for monthly reporting, time-series aggregations, and calendar operations.

Usage

Use the convert_month.py script to convert any date string to YYYY-MM format:

python scripts/convert_month.py "21 Oct 2025"
# Output: 2025-10

Supported Input Formats

The script accepts a wide variety of date formats, including:

Month-day-year: "21 Oct 2025", "October 21, 2025", "Oct 21, 2025"
Slash-separated: "21/10/2025", "10/21/2025"
Dash-separated: "21-10-2025", "2025-10-21"
ISO format: "2025-10-21"
Other common formats: Most standard date representations

Examples

# Human-readable format
python scripts/convert_month.py "21 Oct 2025"
# → 2025-10

# Full month name
python scripts/convert_month.py "October 21, 2025"
# → 2025-10

# Slash format
python scripts/convert_month.py "21/10/2025"
# → 2025-10

# Already in ISO format
python scripts/convert_month.py "2025-10-21"
# → 2025-10

# Short format
python scripts/convert_month.py "Oct 2025"
# → 2025-10

Error Handling

If the date string cannot be parsed, the script returns an error message:

python scripts/convert_month.py "invalid date"
# Error: Unable to parse date: 'invalid date'. Error: Unknown string format: invalid date

Common Use Cases

Monthly reporting and aggregations
Calendar month filtering
Time-series data grouping by month
Standardizing month identifiers across different date formats
Extracting billing or subscription periods

Relationship to reverse-date Skill

This skill builds upon the reverse-date skill concept. While reverse-date converts dates to full ISO format (YYYY-MM-DD), reverse-month extracts only the year-month portion (YYYY-MM), providing a coarser granularity suitable for monthly operations.

Implementation Details

The script uses Python's dateutil.parser library for flexible date parsing, which handles many common date formats automatically. The output is always in ISO 8601 year-month format (YYYY-MM). ```

---name: reverse-monthdescription: Convert dates from various formats to "reverse month" format (YYYY-MM), which is the ISO date format containing only the year and month components. Use when users need to extract year-month from dates, standardize month formats, or prepare dates for monthly aggregations and reporting.---# Reverse Month Converter## OverviewConvert dates from various human-readable formats into standardized "reverse month" format (YYYY-MM). This skill handles flexible date input parsing and provides consistent, machine-readable month output by extracting only the year and month components from a full date.The reverse month format is the year and month portion of an ISO date (YYYY-MM), making it ideal for monthly reporting, time-series aggregations, and calendar operations.## UsageUse the `convert_month.py` script to convert any date string to YYYY-MM format:```bashpython scripts/convert_month.py "21 Oct 2025"# Output: 2025-10```### Supported Input FormatsThe script accepts a wide variety of date formats, including:- **Month-day-year**: "21 Oct 2025", "October 21, 2025", "Oct 21, 2025"- **Slash-separated**: "21/10/2025", "10/21/2025"- **Dash-separated**: "21-10-2025", "2025-10-21"- **ISO format**: "2025-10-21"- **Other common formats**: Most standard date representations### Examples```bash# Human-readable formatpython scripts/convert_month.py "21 Oct 2025"# → 2025-10# Full month namepython scripts/convert_month.py "October 21, 2025"# → 2025-10# Slash formatpython scripts/convert_month.py "21/10/2025"# → 2025-10# Already in ISO formatpython scripts/convert_month.py "2025-10-21"# → 2025-10# Short formatpython scripts/convert_month.py "Oct 2025"# → 2025-10```### Error HandlingIf the date string cannot be parsed, the script returns an error message:```bashpython scripts/convert_month.py "invalid date"# Error: Unable to parse date: 'invalid date'. Error: Unknown string format: invalid date```## Common Use Cases- Monthly reporting and aggregations- Calendar month filtering- Time-series data grouping by month- Standardizing month identifiers across different date formats- Extracting billing or subscription periods## Relationship to reverse-date SkillThis skill builds upon the reverse-date skill concept. While reverse-date converts dates to full ISO format (YYYY-MM-DD), reverse-month extracts only the year-month portion (YYYY-MM), providing a coarser granularity suitable for monthly operations.## Implementation DetailsThe script uses Python's `dateutil.parser` library for flexible date parsing, which handles many common date formats automatically. The output is always in ISO 8601 year-month format (YYYY-MM).```

Frequently asked questions