To ensure the bundle can be built in a reproducible manner, the timestamp of the zip entries is set to the fixed time
1980-02-01T00:00:00Z when the value of this instruction is
The value can also be set to either an ISO-8601 formatted time or the number of seconds since the epoch which is used as the timestamp for the zip entries.
Bnd-LastModified header is also omitted from the manifest.
The default value is