GMT Standard Time is a Time Zone Identifier which tracks "Greenwich Mean Time" (GMT) in the winter and "British Summer Time" (BST; +01:00 UTC) in the summer. Greenwich Mean Time is the local mean time at the Royal Observatory in Greenwich, London so no summer time offsets are applicable (it's not like the sun jumps forward 15 degrees in the sky in spring and back again in the autumn).
datetime.now(timezone.utc) datetime.now(timezone.utc).timestamp() * 1000 # POSIX timestamp in milliseconds For your purposes when you need to calculate an amount of time spent between two dates all that you need is to subtract end and start dates. The results of such subtraction is a timedelta object. From the python docs:
datetime - How to get UTC time in Python? - Stack Overflow
UTC, which stands for Coordinated Universal Time in English, is defined by atomic clocks, but is otherwise the same. In UTC a second always has the same length. Leap seconds are inserted in UTC to keep UTC and GMT from drifting apart. By contrast, in GMT the seconds are stretched as necessary, so in principle they don’t always have the same ...
Does time.time() in the Python time module return the system's time or the time in UTC?
37 Your goal shouldn't be to add a Z character, it should be to generate a UTC "aware" datetime string in ISO 8601 format. The solution is to pass a UTC timezone object to datetime.now() instead of using datetime.utcnow():
Python UTC datetime object's ISO format doesn't include Z (Zulu or Zero ...
How do I convert a datetime string in local time to a string in UTC time? I'm sure I've done this before, but can't find it and SO will hopefully help me (and others) do that in future. Clarifica...