"Sun, 21 Apr 2024 18:41:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
18:41:19
General datetime
2024-04-21 18:41:19Z
For Database
2024-04-21 18:41:19
For HTTP1.1
Sun, 21 Apr 2024 18:41:19 GMT