"Mon, 27 May 2024 18:21:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240527
Only TIME
18:21:20
General datetime
2024-05-27 18:21:20Z
For Database
2024-05-27 18:21:20
For HTTP1.1
Mon, 27 May 2024 18:21:20 GMT