CRONTAB

CRONTAB is a program that will run programs based on the date. Execution can be periodic such as daily, weekly, monthly, or yearly with or without a specified offset such as the third day of the month. Execution can also be day-specific such as every Monday, Wednesday, Friday, or on the 15th of each month. If it has to be done periodically, then CRONTAB is the program to do it.