Is there a datetime ± infinity?

For floats we have special objects like -inf (and +inf), and which are guaranteed to compare less than (and greater than) other numbers.

I need something similar for datetimes, is there any such thing? In-db ordering must work correctly with django queryset filters, and ideally it should be db-agnostic (but at the very least it must work with mysql and sqlite) and timezone-agnostic.

At the moment I'm using null/`None`, but it is creating very messy queries because `None` is doing the job of *both* -inf and +inf and I have to explicitly account for all those cases in the queries.

There isn't; the best you have is the [`datetime.datetime.min`](

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) and [`datetime.datetime.max`](

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) values.

These are guaranteed to be the smallest and largest `datetime` values, but `datetime.datetime.min == datetime.datetime.min` is still `True`; everything else is larger. The inverse is true for the `datatime.datetime.max` value.

There are also `min` and `max` values for `datetime.date` and `datetime.time`.

Try this:

>>> import datetime
>>> datetime.datetime.max
datetime.datetime(9999, 12, 31, 23, 59, 59, 999999)

You can get `min`/`max` for `datetime`, `date`, and `time`.

In case someone is using dates in Pandas dataframe:

>>> import pandas as pd
>>> pd.Timestamp.min
Timestamp('1677-09-21 00:12:43.145225')
>>> pd.Timestamp.max
Timestamp('2262-04-11 23:47:16.854775807')