📅 Date Cycle Finder

https://pawloland.github.io/DateCycleFinder/

What is this?

Date Cycle Finder is a simple web tool that helps you find dates in other years that fall on the same weekday as a selected date.

It allows you to:

• Search past or future years
• Find dates with the same weekday
• Highlight perfect calendar cycle matches
• See the next exact calendar repeat

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Why was this created?

This tool was created mainly to work around limitations in legacy devices that only support a restricted range of years.

Some older systems:

• Only allow selecting dates within a fixed year range (e.g. 2000–2020)
• Still rely on correct weekday alignment for proper operation

Because of this, you may need to:

Pick a different year within the allowed range that behaves the same as your desired date.

This tool helps you find such substitute dates by matching:

• The same day and month
• The same weekday
• Optionally, the same leap-year structure

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How it works

1. Select your desired date
2. Choose search direction (past or future)
3. (Optional) Enable same leap-year pattern
4. Click Find Matches

The tool will:

• List matching dates in other years
• Show how many years apart they are
• Highlight full calendar repeats (⭐)
• Display the next perfect cycle