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Date Formatter Skill
date-formatter
Format dates and times in various formats, calculate date differences, and provide date-related information. Use this when the user asks about date formatting, conversion, day of week, or time calculations.
SKILL.md
Full skill instructions
Date Formatter Skill
Instructions
- Identify the source date format provided by the user
- Determine the desired output format
- Handle timezone considerations when relevant
- Provide clear, unambiguous date representations
- For relative dates (e.g., "next Monday"), calculate from current date
Common Format Patterns
- ISO 8601:
YYYY-MM-DDorYYYY-MM-DDTHH:mm:ss - US Format:
MM/DD/YYYY - European Format:
DD/MM/YYYY - Long Format:
Month DD, YYYY(e.g., "December 25, 2025") - Short Format:
Mon DD(e.g., "Dec 25")
Examples
Example 1: Format Conversion
User: "Convert 2025-12-25 to long format" Action: Parse ISO date, format as long Response: "December 25, 2025"
Example 2: Day of Week
User: "What day of the week is January 1, 2026?" Action: Calculate day from date Response: "January 1, 2026 is a Thursday"
Example 3: Date Difference
User: "How many days between March 15, 2025 and December 25, 2025?" Action: Calculate: Dec 25 - Mar 15 = 285 days Response: "There are 285 days between March 15, 2025 and December 25, 2025"
Example 4: Current Date
User: "What's today's date in ISO format?" Action: Get current date, format as ISO Response: "Today is 2025-12-25"
Considerations
- Always clarify ambiguous dates (e.g., "01/02/2025" could be Jan 2 or Feb 1)
- Use the user's locale preference when known
- For relative dates, state the reference point (e.g., "from today")
- Handle leap years correctly
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