How to Convert a Date to UNIX Miliseconds at Midnight for Hubspot API

Question

I am trying to input data into the Hubspot API using Python.

I have dates in the format of %m%d%Y. I need to convert this to UNIX time in milliseconds. I have that part set, I believe, using the code below.

t = '09/02/2020'
t = datetime.strptime(t, "%m/%d/%Y").strftime("%Y-%m-%dT%H:%M:%S.%f")
ts = time.mktime(datetime.strptime(t, "%Y-%m-%dT%H:%M:%S.%f").timetuple())
ts * 10000
ts = int(ts)

The end result for this example is

t= 2020-09-02T00:00:00.000000

ts = 1599019200

If I take the result of ts and put it into https://www.unixtimestamp.com/index.php it appears to convert to 09/02/2020 @ 4:00am (UTC)

However Hubspot says "Date properties will only store the date, and must be set to midnight UTC for the date you want."

Where I am lost is, I don't know how to set this up so that the result is always set to midnight UTC and I cannot find any examples that would help me do that.

Can anyone help explain how to do that?

Answer 1

There's datetime.timestamp() method which returns date in unixtime format, but if you'll take a look in docs of this method, you'll see:

Note: There is no method to obtain the POSIX timestamp directly from a naive datetime instance representing UTC time. If your application uses this convention and your system timezone is not set to UTC, you can obtain the POSIX timestamp by supplying tzinfo=timezone.utc :

timestamp = dt.replace(tzinfo=timezone.utc).timestamp()

or by calculating the timestamp directly:

timestamp = (dt - datetime(1970, 1, 1)) / timedelta(seconds=1)

So, following docs solutions are:

from datetime import datetime, timezone, timedelta

t = "09/02/2020"
ts = datetime.strptime(t, "%m/%d/%Y").replace(tzinfo=timezone.utc).timestamp()
# OR
ts = (datetime.strptime(t, "%m/%d/%Y") - datetime(1970, 1, 1)).total_seconds()