Question 161875 in Redis Question posted in
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What is the UTC datetime for NYSE close time (4.00 PM EST)?

I have a background task that I want to schedule to run once the NYSE is closed.
My background scheduler (redis-rq) requires the time will be in UTC and I’m using python.
The task is scheduled during the trading day, so it means that I can’t use offset or specific dates because it can be called dynamically.

So, what I just want is that once a trigger is called, I want to schedule the task to run at the end of the current trading day, which again is 16:00 EST time.

I’ve tried several options like getting the time in EST with:

datetime.time(16, 0, tzinfo=pytz.timezone('US/Eastern'))

But I can’t figure out how to convert it to UTC, I tried stuff like .replace() with no success.

Thanks in advance.

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2

Answers


  1. 0

    You can use today’s date, combine with the desired NY time, set the time zone to New York (US Eastern), then convert to UTC:

    from datetime import date, datetime, time
from zoneinfo import ZoneInfo # Python 3.9

t_utc = (
    datetime.combine(
        date.today(),
        time(16,0),
    )
    .replace(tzinfo=ZoneInfo("America/New_York"))
    .astimezone(ZoneInfo("UTC"))
)

print(t_utc)
2023-05-10 20:00:00+00:00

    Note on time zone handling:

    • with the deprecated pytz you cannot replace the tzinfo, use e.g. pytz.timezone("America/New_York").localize(... instead
    • for zoneinfo to work properly on Windows, make sure to have tzdata package installed and up-to-date
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  2. 0

    Try to use pytz library: https://pypi.org/project/pytz/ .

    The code with this library can solve your task:

    import pytz
from datetime import datetime, time

nyse_close_time_et = time(16, 0)
now_et = datetime.now(pytz.timezone('US/Eastern'))
nyse_close_datetime_et = datetime.combine(now_et.date(), nyse_close_time_et)
nyse_close_datetime_utc = nyse_close_datetime_et.astimezone(pytz.utc)
print(nyse_close_datetime_utc)
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