"Sun, 18 Aug 2024 19:20:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240818
Only TIME
19:20:03
General datetime
2024-08-18 19:20:03Z
For Database
2024-08-18 19:20:03
For HTTP1.1
Sun, 18 Aug 2024 19:20:03 GMT