- last_modification_time => sub { gmtime },
- creation_time => sub { gmtime },
- last_access_time => sub { gmtime },
- expiry_time => sub { gmtime },
+ last_modification_time => sub { scalar gmtime },
+ creation_time => sub { scalar gmtime },
+ last_access_time => sub { scalar gmtime },
+ expiry_time => sub { scalar gmtime },