Step 1 – Enable scheduler

MDS-TAPE-3S-01# config terminal
Enter configuration commands, one per line.  End with CNTL/Z.
MDS-TAPE-3S-01(config)# scheduler enable

Step 2 – Create job

MDS-TAPE-3S-01(config)#
MDS-TAPE-3S-01(config)#
MDS-TAPE-3S-01(config)# scheduler job name backup_config
MDS-TAPE-3S-01(config-job)# copy running-config startup-config
MDS-TAPE-3S-01(config-job)# copy startup-config tftp://xxx.xxx.xxx.xxx/MDS-TAPE-3S-01_$(TIMESTAMP)
MDS-TAPE-3S-01(config-job)#
MDS-TAPE-3S-01#

Step 3 – Create scheduler and connect job

MDS-TAPE-3S-01# conf t
Enter configuration commands, one per line.  End with CNTL/Z.
MDS-TAPE-3S-01(config)# scheduler schedule name serale_22
MDS-TAPE-3S-01(config-schedule)# job name backup_config
MDS-TAPE-3S-01(config-schedule)# time daily 22:35
MDS-TAPE-3S-01(config-schedule)#

Step 4 – Verify configuration scheduler

DS-TAPE-3S-01# show scheduler schedule
Schedule Name       : serale_22
——————————-
User Name           : admin
Schedule Type       : Run every day at 22 Hrs 35 Mins
Last Execution Time : Yet to be executed
———————————————–
     Job Name            Last Execution Status
———————————————–
    backup_config                         -NA-
=======================================

It is possible schedule job weekley :

MDS-TAPE-3S-01(config-schedule)# time weekly Sun:23:30

For change job is not possible modify actual job but need delete  and recreate