timezones | All the timezones of all the cities , as a static site | JSON Processing library

This is perfect for what I need an no one seems to be answering it:

So, I have a fun issue. I have some data that have a fun nested dictionary that I need to manipulate, but am having trouble. I can do it in pure python, but wanted to do the entire solution in Pandas so as to keep the code a little cleaner and not have to re-open the same files elsewhere.

I have the following Dataframe:

No, I'm not trying to do this in any particular language. If all you have is math, is it possible to extract the hour of day from a timestamp, if so how?

Here's a sample timestamp 1602934899. The expected output (the hour in that timestamp) is 11.

I'm trying to accomplish this without any libraries. Also, I'm aware of leap seconds and I don't care about the lack of precision that may be caused if I ignore it for my purposes. I also don't care for leap years or timezones or daylight savings time.

I get a time value from an API which is a unix value, but when i use DateTime.fromMillisecondsSinceEpoch, it shows one day less. I don't understand why. Please explain me what i'm doing wrong.

I think timezones made the problem, but i don't know how to fix it.

Unix value from API

I´m strugeling a bit with Pytrends, specifically the TZ. When changing the timezones, it does not change the timestamp in the output.

I'd like to serialize a std::chrono::local_time by sending it's time_since_epoch().count() value. My question is how is a non-C++ receiver supposed to interpret that value? Is it the actual number of ticks since the epoch at local midnight (1970-01-01T00:00:00)? What about daylight saving time changes? Is the time_since_epoch() bijective with the wall clock time? That is, can there be two values of std::chrono::local_time::time_since_spoch() that represent the same wall clock/calendar time?

I cannot find detailed information about the interpretation of std::chrono::local_time::time_since_spoch() at the usual places: cppreference, the latest C++ standard draft, or Howard Hinnant's date library documentation.

'Why even serialize a std::chrono::local_time?', you may ask. Well, a use case would be a building automation system that must perform a certain task at a given local time on a special day, regardless of timezones or daylight saving time. For example, "turn off the lights at 20:00 local time on Earth Day, 2021 (April 22).

EDIT: 'Why not serialize it as an ISO8601 date/time (without any offset), you may ask?'. I want to serialize it as a compact number using a binary protocol, such as CBOR.

I am trying to get appointments that are saved with UTC times filtered by e.g. the date. The problem is an appointment can be saved for UTC June 1st 10:00 PM, but when the user is located in Germany, that would be June 2nd 12:00 AM for that user's local time. When the user requests all appointments for June 1st that appointment should not appear, but when June 2nd is requested, it should.

As long as the backend doesn't know which timezone to apply, it will behave the other way around.

I am aware of ToLocalTime() in the backend, but as for my understanding that will only behave correctly as long as the client is in the same timezone as the server.

One might say, that I could use getTimezoneOffset() on the client side and pass it to the backend in some way. But that won't work, because of daylight savings. UTC December 1st 10:00 PM would result in a German local time of December 1st 11:00 PM, so applying the current timezone offset doesn't help.

I figured out, that most browsers will support Intl.DateTimeFormat().resolvedOptions().timeZone to get the timezone as a text. But passing that one to the backend didn't help either, because when I check the list of supported timezones returned by TimeZoneInfo.GetSystemTimeZones() in the backend, I can't find the same string as the browser provides. (browser returns 'Europe/Berlin', Id in backend is 'W. Europe Standard Time', other strings are even localized)

I know that I'm exhausted a bit, because working with dates and times was a reoccuring theme for me today, but am I missing out on something obvious? What can I do to make the backend aware of the relevant timezone? And how would I get the DateTime for that specific timezone?

I have an object with 2 properties available - timestamp and timezone, and they usually look something like this:

So the issue is when I use the stop command on one server it stops on literally every server that has the bot. I believe it may have to do with the fact that I am not storing the tasks anywhere. Maybe it is because it is all controlled by a globalvar? Sorry for the messy code. Here is the code that handles everything:

I know time and timezones is a difficult issue, yet I'm still confused by the following: