If you are using Django with USE_TZ=True, then Django stores times in UTC and various template utilities help to convert to the user's/current timezone as necessary. However, when serialising objects to JSON (which many API libraries do) they'll often directly convert the UTC time. This might be what you want, but you might also be using the API…

to_local_time

# assuming utc_datetime is the datetime to convert:
from django.utils import timezone
current_tz = timezone.get_current_timezone()
local_time = current_tz.normalize(utc_datetime).astimezone(current_tz)