Stamped times, are they TZ aware?

[KaraMelih]

Thanks to @sybenzvi while working on #98 we noticed that tz aware and tz naive times would cause troubles when tracking the heartbeats from the last 24hr.

I'm opening this issue so we can confirm that every timestamp we use considers UTC times (e.g. tz naive)

[KaraMelih]

The sent time stamps are using UTC; https://github.com/SNEWS2/SNEWS_Publishing_Tools/blob/62a62526aa3a3dd1147dad721893af53df520e8a/snews_pt/messages.py#L74

[sybenzvi]

Two questions:

1. Is this issue entangled with the creation of timestamps in snews_pt?
2. Is there a PR on this project that we want to create?

[KaraMelih]

The times that we (the software) stamp are always UTC;

Here is the "Received Time"

SNEWS_Coincidence_System/snews_cs/snews_coinc.py

Line 582 in f71f103

snews_message['received_time'] = np.datetime_as_string(np.datetime64(datetime.utcnow().isoformat()), unit='ns')

Here is the "Sent Time"
https://github.com/SNEWS2/SNEWS_Publishing_Tools/blob/62a62526aa3a3dd1147dad721893af53df520e8a/snews_pt/messages.py#L74

The neutrino time that the user passes are asked to be ISO-Format strings. My understanding is that iso-format also uses UTC, and since they pass strings, we have no way of checking the tz properties.