In what format should the date and time be transmitted over the network?

Question

Computer networks

What date and time format is considered optimal, common, and convenient for transferring between systems today.
I am making an API and sending JSON via HTTP. The recipient of the JSON is not users, but systems.
What do you think?

Answer 1

It does n't matter what, for example
https://stackoverflow.com/questions/10286204/the-r...

2012-04-23T18:25:43.511Z
Here's why:
It's human readable but also succinct
It sorts correctly
It includes fractional seconds, which can help re-establish chronology
It conforms to ISO 8601
ISO 8601 has been well-established internationally for more than a decade
ISO 8601 is endorsed by W3C, RFC3339, and XKCD

Answer 2

(Not date, but data!)
Any format.

Answer 3

It is necessary to transmit the number of elapsed days / hours / seconds / ... (depending on the required accuracy) from the beginning of 2019 to the year 2100.

Answer 4

unix time
Only in the 64-bit version, so that in 2038 there will be no problems.