Generate Palindromic Calendar Dates

Want to find dates that look the same forward and backward? The Generate Palindromic Calendar Dates Tool scans across entire centuries to uncover symmetrical dates in either ISO (YYYY-MM-DD) or US (MM/DD/YYYY) format.

Total items: 0
Options
Use ISO format (YYYY-MM-DD)
Pad with zeros
Limit to 1900–2099

How to Use:

  1. Palindromic dates are generated automatically when the page loads.
  2. Use the toggles in the Options box to:
    • Switch between ISO and US date formats.
    • Turn on zero-padding for single-digit months/days.
    • Limit the date range to 1900–2099 (enabled by default for speed).
  3. Click Generate to refresh based on your selected settings.
  4. Use Copy Output to copy the result to your clipboard.
  5. Use Export to File to download the list as a .txt file.
  6. Hit Clear All to reset everything.

What Generate Palindromic Calendar Dates Tool can do:

It checks every valid calendar date across your selected year range and finds the ones where the full numeric string is a perfect palindrome. You can easily explore how date formatting and padding affect what counts as palindromic. Toggling ISO format gives you a globally standardized view, while US format shows how symmetry plays out across different styles.

Example:

In ISO mode with padding, you might see:

2002-02-20
2010-01-02
2020-02-02

Switching to US format gives:

02/02/2020
01/02/2010
12/02/2021

Common Use Cases:

Great for numerology fans, date designers, trivia creators, or anyone looking for visually symmetrical or rare patterns in the calendar. These dates are often celebrated for their uniqueness and make fun targets for birthdays, events, or even software versioning schemes.

Useful Tools & Suggestions:

If you’re already exploring symmetry in dates, Generate Equal Y-M-D Dates helps you build patterns where all components align. And to play with time in a similar way, Generate Palindromic Clock Times adds a mirrored twist to hours and minutes great for puzzles, visuals, or just nerdy fun with formatting.

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