How to rsync only one month data rather mirroring the remote machine complete data

[kbala at midascomm.com]

Hi,

Scenario:
  we have a backup server which backup the data from some set of remote
machine. Accidently we have deleted the backup directory and in remote
machine more than 1 year data is available. We are only intrested in one
month data rather transfering all the datas. ( may be transfer the data
from remote machine which are created after time t1.)


Regards,
Bala