timestamps.py

"""
Should follow:
https://en.wikipedia.org/wiki/ISO_8601

See also:
-   https://stackoverflow.com/questions/2150739/iso-time-iso-8601-in-python
"""

import time
timestamp = time.strftime('%Y-%m-%d-%Hh%M')    # '2019-02-14-16h20'
timestamp = time.strftime('%Y-%m-%dT%H:%M:%S') # '2019-02-15T13:18:09'

import datetime
utc_offset_sec = time.altzone if time.localtime().tm_isdst else time.timezone
utc_offset = datetime.timedelta(seconds=-utc_offset_sec)
datetime.datetime.now().replace(microsecond=0).replace(tzinfo=datetime.timezone(offset=utc_offset)).isoformat() # '2019-02-15T12:28:43-08:00'

import pytz
datetime.datetime.now().replace(microsecond=0).astimezone(pytz.timezone("America/Los_Angeles")).isoformat() # '2019-02-15T12:32:44-08:00'

Also in bash:

$ echo "$(date +'%Y-%m-%dT%H:%M%z')"
2019-02-18T11:05-0800
$ echo "$(date +'%Y-%m-%dT%H:%M')"
2019-02-18T11:06
$ echo "$(date +'%Y-%m-%d')"
2019-02-18