"Sat, 25 Apr 1970 07:12:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700425
Only TIME
07:12:38
General datetime
1970-04-25 07:12:38Z
For Database
1970-04-25 07:12:38
For HTTP1.1
Sat, 25 Apr 1970 07:12:38 GMT