Gmail API not returning correct emails compared to Gmail web UI for date queries

Question

The results differ between the Gmail api and Gmail web ui when using the standard query format as described here - https://support.google.com/mail/answer/7190.

The i

Answer 1

You can list the messages with second accuracy if you would like:

q = after:<start_of_day_in_seconds> AND before:<end_of_day_in_seconds>

So e.g. from Wed, 25 Nov 2015 00:00:00 GMT to Wed, 25 Nov 2015 23:59:59 GMT would be:

q = after:1448409600 AND before:1448495999