Help:Scheduler Modified start time and end time

[Mark de Torres]

Currently i have develop Scheduler correctly. However, i have difficulty if the start date and end date changed.

Originally
start = '24-01-2011'
end =' 16-12-2011'

i need to modified the above start and end date to the following

start1 = '24-01-2011'
end1 = '01-04-2011'

start2='11-04-2011'
end2 ='24-06-2011'

start3='25-07-2011'
end3='30-09-2011'

start4='10-10-2011'
end4='16-12-2011'

Please advise