"Wed, 14 Jan 1970 07:49:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
07:49:51
General datetime
1970-01-14 07:49:51Z
For Database
1970-01-14 07:49:51
For HTTP1.1
Wed, 14 Jan 1970 07:49:51 GMT