Date Related Shell Functions

Many shell programs need to compute dates, for example, to retrieve yesterday's backup, to create Oracle table partitions for next week, or to run a job the first Saturday every month. In this article, we present the following date-related functions written in shell:

• pn_month — Previous and next x months relative to the given month
  
• end_month — End of month of the given month
  
• pn_day — Previous and next x days of the given day
  
• cur_weekday — Day of week for the given day
  
• pn_weekday — Previous and next x day of weeks relative to the given day