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DateOverlapsQ
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DateOverlapsQ

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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.

Examples

open allclose all

Basic Examples  (2)Summary of the most common use cases

Now and Today are overlapping:

In[1]:=1
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https://wolfram.com/xid/0gfs3a0y4ber-cynmew
Out[1]=1

But Now and Yesterday are not:

In[2]:=2
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https://wolfram.com/xid/0gfs3a0y4ber-le3fj
Out[2]=2

Test whether a given week overlaps with the year 2022:

In[1]:=1
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https://wolfram.com/xid/0gfs3a0y4ber-bo6ndj
Out[1]=1

Scope  (3)Survey of the scope of standard use cases

Test whether a date overlaps several different dates:

In[1]:=1
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https://wolfram.com/xid/0gfs3a0y4ber-elqge8
Out[1]=1

Test whether several dates overlap a given date:

In[1]:=1
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https://wolfram.com/xid/0gfs3a0y4ber-gc3h8v
Out[1]=1

Test for overlaps of several dates against several other dates:

In[1]:=1
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https://wolfram.com/xid/0gfs3a0y4ber-x6n8t
Out[1]=1

Properties & Relations  (3)Properties of the function, and connections to other functions

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

In[3]:=3
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https://wolfram.com/xid/0gfs3a0y4ber-f79xj2
Out[3]=3

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

In[4]:=4
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https://wolfram.com/xid/0gfs3a0y4ber-km0wk
Out[4]=4

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

In[1]:=1
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https://wolfram.com/xid/0gfs3a0y4ber-kg4y0h
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0gfs3a0y4ber-bck6al
Out[2]=2

If two date objects overlap, they cannot be compared:

In[1]:=1
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https://wolfram.com/xid/0gfs3a0y4ber-eiz8l6
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0gfs3a0y4ber-hq72b4
Out[2]=2
Wolfram Research (2017), DateOverlapsQ, Wolfram Language function, https://reference.wolfram.com/language/ref/DateOverlapsQ.html.
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Wolfram Research (2017), DateOverlapsQ, Wolfram Language function, https://reference.wolfram.com/language/ref/DateOverlapsQ.html.

Text

Wolfram Research (2017), DateOverlapsQ, Wolfram Language function, https://reference.wolfram.com/language/ref/DateOverlapsQ.html.

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Wolfram Research (2017), DateOverlapsQ, Wolfram Language function, https://reference.wolfram.com/language/ref/DateOverlapsQ.html.

CMS

Wolfram Language. 2017. "DateOverlapsQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DateOverlapsQ.html.

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Wolfram Language. 2017. "DateOverlapsQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DateOverlapsQ.html.

APA

Wolfram Language. (2017). DateOverlapsQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DateOverlapsQ.html

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Wolfram Language. (2017). DateOverlapsQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DateOverlapsQ.html

BibTeX

@misc{reference.wolfram_2025_dateoverlapsq, author="Wolfram Research", title="{DateOverlapsQ}", year="2017", howpublished="\url{https://reference.wolfram.com/language/ref/DateOverlapsQ.html}", note=[Accessed: 06-April-2025 ]}

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@misc{reference.wolfram_2025_dateoverlapsq, author="Wolfram Research", title="{DateOverlapsQ}", year="2017", howpublished="\url{https://reference.wolfram.com/language/ref/DateOverlapsQ.html}", note=[Accessed: 06-April-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_dateoverlapsq, organization={Wolfram Research}, title={DateOverlapsQ}, year={2017}, url={https://reference.wolfram.com/language/ref/DateOverlapsQ.html}, note=[Accessed: 06-April-2025 ]}

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@online{reference.wolfram_2025_dateoverlapsq, organization={Wolfram Research}, title={DateOverlapsQ}, year={2017}, url={https://reference.wolfram.com/language/ref/DateOverlapsQ.html}, note=[Accessed: 06-April-2025 ]}