"Mon, 19 Aug 2024 15:38:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240819
Only TIME
15:38:21
General datetime
2024-08-19 15:38:21Z
For Database
2024-08-19 15:38:21
For HTTP1.1
Mon, 19 Aug 2024 15:38:21 GMT