"Sun, 23 Jun 2024 18:12:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240623
Only TIME
18:12:21
General datetime
2024-06-23 18:12:21Z
For Database
2024-06-23 18:12:21
For HTTP1.1
Sun, 23 Jun 2024 18:12:21 GMT