"Fri, 21 Jun 2024 18:38:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240621
Only TIME
18:38:21
General datetime
2024-06-21 18:38:21Z
For Database
2024-06-21 18:38:21
For HTTP1.1
Fri, 21 Jun 2024 18:38:21 GMT