[whpalmer4]

There is a simple solution, but it isn't necessarily what you might call elegant :-)

If you want an oddly repeating item, often the best bet is to step back and find a pattern that isn't so odd. For example, with your weekdays only, instead of trying to repeat 5 days, then skip 2 days, you set up 5 different events that repeat weekly, one starting each day of the week. Use start dates so they don't appear in your lists of available actions until the right day. I often put the name of the day of the week in parentheses to help eliminate any potential confusion. There's a hidden benefit to this approach, too—if you don't happen to complete the previous day's action before the next day's action is supposed to start, you still get the next day's action on time because it is only dependent on your having completed the previous week's action within a week. It is also better suited to tasks which aren't completely uniform. My kid's school district has full days M,T,Th,F, so I need to make him a lunch on those days, but on W they get out before lunch and so he doesn't need a lunch packed. Even if they had a "repeat only on weekdays" option I would still need multiple actions.

It should be easy to see how you would use this for a task like fertilizing the lawn every month during the summer months only: a task that repeats yearly, with one for each of the summer months. Just remember the start dates!