Find Overlapping Dates

The Find Overlapping Dates Tool lets you paste or import date ranges and instantly detect which ones overlap. Whether you’re comparing time-off requests, project timelines, or booking schedules, this tool shows you exactly where conflicts exist.

You can remove duplicates, sort results, or merge adjacent overlaps. The Find Overlapping Dates Tool updates live, supports file imports, and gives you fast, accurate feedback.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .log
Total items: 0
Options
Sort output
Remove duplicates
Merge adjacent overlaps

How to Use:

  1. Enter date ranges into the input box using the format YYYY-MM-DD to YYYY-MM-DD, one range per line.
  2. Or click Choose File to import a .txt, .csv, or .log file with date ranges.
  3. Use the Options toggles to:
    • Sort the output
    • Remove duplicate overlaps
    • Merge adjacent overlaps into one range
  4. The overlapping date ranges will appear on the right, updating live as you type.
  5. Click Copy Output or Export to File to save the results.
  6. Press Clear All to reset everything.

What Find Overlapping Dates Tool can do:

This tool checks every pair of date ranges and outputs any that overlap – meaning one starts before the other ends. You can optionally:

  • Sort the resulting overlaps
  • Merge overlaps that are next to each other
  • Remove duplicates from the list

It works great with large lists and updates instantly as you paste or import data.

Example:

Input:
2024-01-01 to 2024-01-10
2024-01-05 to 2024-01-15
2024-02-01 to 2024-02-10
2024-02-05 to 2024-02-07

Output:
2024-01-05 to 2024-01-10
2024-02-05 to 2024-02-07

Common Use Cases:

You can use this tool to catch overlapping bookings, validate calendar data, identify time conflicts between two teams, or audit logs for repeated date blocks. It’s great for event planners, HR schedulers, project managers, or anyone working with date intervals.

Useful Tools & Suggestions:

If you’re already tracking overlaps, Find Overlapping Times helps you spot conflicts on the clock side too. And when you want to generate scenarios to test, Generate Overlapping Dates gives you plenty to work with.

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