"Sat, 18 Apr 1970 07:12:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700418
Only TIME
07:12:00
General datetime
1970-04-18 07:12:00Z
For Database
1970-04-18 07:12:00
For HTTP1.1
Sat, 18 Apr 1970 07:12:00 GMT