"Sat, 27 Apr 2024 20:15:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240427
Only TIME
20:15:18
General datetime
2024-04-27 20:15:18Z
For Database
2024-04-27 20:15:18
For HTTP1.1
Sat, 27 Apr 2024 20:15:18 GMT