DateOverlapsQ

DateOverlapsQ[date₁,date₂]

returns True if the calendar dates date₁ and date₂ overlap, and False otherwise.

Details

In DateOverlapsQ[date₁,date₂], both date₁ and date₂ should be specified as DateObject expressions of any calendar granularity.
DateOverlapsQ accepts lists of dates in both arguments, effectively calling Outer on the input lists.
DateOverlapsQ returns True if there is any intersection in the time period represented by date₁ and date₂.

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Now and Today are overlapping:

But Now and Yesterday are not:

Test whether a given week overlaps with the year 2022:

Test whether a date overlaps several different dates:

Test whether several dates overlap a given date:

Test for overlaps of several dates against several other dates:

DateOverlapsQ returns True if any part of the dates are overlapping:

DateWithinQ will return True only if date₂ is entirely contained within date₁:

If two dates overlap, their difference will be zero of the largest calendar granularity:

If two date objects overlap, they cannot be compared:

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