"Mon, 27 May 2024 18:15:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240527
Only TIME
18:15:03
General datetime
2024-05-27 18:15:03Z
For Database
2024-05-27 18:15:03
For HTTP1.1
Mon, 27 May 2024 18:15:03 GMT