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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.
Clarification: For example, if I have 2008-09-17 14:02:00 in my local timezone (+10), I'd like to generate a string with the equivalent UTC time: 2008-09-17 04:02:00.
Also, from http://lucumr.pocoo.org/2011/7/15/eppur-si-muove/, note that in general this isn't possible as with DST and other issues there is no unique conversion from local time to UTC time.
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Add the local time offset to the UTC time. For example, if your local time offset is -5:00, and if the UTC time is shown as 11:00, add -5 to 11. The time setting when adjusted for offset is 06:00 (6:00 A.M.). Note The date also follows UTC format.
Python convert a string to datetime with timezone In this example, I have imported a module called timezone. datetime. now(timezone('UTC')) is used to get the present time with timezone. The format is assigned as time = “%Y-%m-%d %H:%M:%S%Z%z”.
Use the toUTCString() method to convert local time to UTC, e.g. new Date(). toUTCString() . The toUTCString() method converts a date to a string, using the UTC time zone. Copied!
Times are expressed in UTC (Coordinated Universal Time), with a special UTC designator ("Z"). Times are expressed in local time, together with a time zone offset in hours and minutes. A time zone offset of "+hh:mm" indicates that the date/time uses a local time zone which is "hh" hours and "mm" minutes ahead of UTC.
First, parse the string into a naive datetime object. This is an instance of datetime.datetime with no attached timezone information. See its documentation.
Use the pytz module, which comes with a full list of time zones + UTC. Figure out what the local timezone is, construct a timezone object from it, and manipulate and attach it to the naive datetime.
Finally, use datetime.astimezone() method to convert the datetime to UTC.
Source code, using local timezone "America/Los_Angeles", for the string "2001-2-3 10:11:12":
from datetime import datetime import pytz local = pytz.timezone("America/Los_Angeles") naive = datetime.strptime("2001-2-3 10:11:12", "%Y-%m-%d %H:%M:%S") local_dt = local.localize(naive, is_dst=None) utc_dt = local_dt.astimezone(pytz.utc) From there, you can use the strftime() method to format the UTC datetime as needed:
utc_dt.strftime("%Y-%m-%d %H:%M:%S") If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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