Why is there a “Week 0” in my job plan schedule?

If Week 0 is showing in your job plan in the By Week tab, then this will represent monthly activity that falls in the first partial week of a job plan.

For example, the below job plan starts is effective from 01/08/2023 but this is a Thursday. When scheduling monthly activities that occur the first week of the first month, this would be before the first full week of the job plan happens, so this is in Week 0.

NOTE: This only occurs with monthly activities that happen in the first week of the month. If the start date of the job plan is a Monday, then Week 0 will not show. There is further Help on this by clicking the ? icon next to Week 0.