"Sat, 15 Jun 2024 19:52:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
19:52:21
General datetime
2024-06-15 19:52:21Z
For Database
2024-06-15 19:52:21
For HTTP1.1
Sat, 15 Jun 2024 19:52:21 GMT