How to test datetime conversion with pytz and tzlocal?

Question

So I have datetime objects that I want to show up for users in their local time.

Using answered questions on here, I've come up with a jinja filter to accomplish this:

from tzlocal import get_localzone
import pytz

def local_datetime(utc_dt):
    local_tz = get_localzone()
    local_dt = utc_dt.replace(tzinfo=pytz.utc).astimezone(local_tz)
    return local_dt.strftime('%m/%d/%y @ %I:%M %p')

app.jinja_env.filters['local_dt'] = local_datetime

{{ user.last_login_at|local_dt }} # in my template

My thought was that it would run each time someone views the page (hence the filter) so that it will always show in the user's native timezone.

It shows up right on my development machine, but I'd like to make sure that get_localzone() is actually grabbing the user's local timezone and not always the server's.

My question is: How can I test if this is working correctly?

I believe `get_localtimezone` gets the system's time zone, not the client's. — dirn, Nov 05 '14 at 01:12

score 3 · Accepted Answer · edited May 23 '17 at 12:05

3

get_localzone() will always return the local timezone of the server your application is running on.

There is nothing in the HTTP headers of the request which can tell you the user's timezone. Instead, the standard way of approaching this is to ask the user to tell you their preferred timezone.

See Determine a User's Timezone for more discussion about this.

edited May 23 '17 at 12:05

Community

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answered Nov 05 '14 at 02:01

VooDooNOFX

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Well that's a bummer, but I suppose it simplifies things. I'll just use UTC everywhere and give the user the option to change it. – Chockomonkey Nov 05 '14 at 17:08

How to test datetime conversion with pytz and tzlocal?

1 Answers1