"Wed, 14 Jan 1970 14:27:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
14:27:05
General datetime
1970-01-14 14:27:05Z
For Database
1970-01-14 14:27:05
For HTTP1.1
Wed, 14 Jan 1970 14:27:05 GMT