I need to do a certain task on the first work day of each month, which may not be the first weekday and may not be the 1st of the month. But if I try to guess at a weekday that would be most likely to coincide with the 1st work day, there will definitely be some months that will have the task on the wrong day.

For example, if I say I need to do this task on the first workday of February and schedule the task to occur on the 1st of each month, the task will occur on Sunday, which is not a workday. But if I schedule the task to occur on the first Monday of each month, then in April it won't remind me until the 6th.