Apple - iOS 5 Reminders on weekdays only
In Reminders.
- Select Repeat
- Select Weekly
- Select Custom
- Select the days, e.g. Monday, Tuesday, Wednesday, Thursday, Friday
If you have an iPhone 4S, or newer, ask Siri to create the reminder for weekdays. She can do it.
Add Calendar event for weekdays only by selecting Every Week, then Custom, which will then allow you to click which days of the week you want. Once select, M-F, it will confirm you selected every weekday. It will then show up as Custom on your Calendar event.