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How to find overlapping date/time ranges in Excel?

Author: Sun Last Modified: 2024-09-24

In this article, I am going to talk about how to find or check if a date range or time range is overlapping with others in Excel as below screenshot shown.
find overlapping date

Check overlapping date/time ranges with formula

arrow blue right bubble Check overlapping date/time ranges with formula

1. Select the start date cells, go to Name Box to type a name and press Enter key to successfully give this range a ranged name. See screenshot:
define a range name for start dates

2. Then go to select the end dates, and give it another ranged name in the Name Box and press Enter key. See screenshot:
define a range name for end dates

3. Select a blank cell that you will place the judgement, and type this formula =SUMPRODUCT((A2<enddate)*(B2>=startdate))>1, and drag auto fill handle down to the cells with the formula. If the cell displays TRUE, it means the relative date range is overlapping with others, otherwise the data ranges are not overlapping with others.
use a formula to check if the relative date range is overlapping with others

In the formula, A2 and B2 are the date range you want to check, enddate and startdate are the ranged names you gave in above steps.

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