Week numbers are very useful for static holiday periods like the kid's school fall vacation and winter vacation. In my area, they are always in week 8 and week 40, and as such it's easier to plan accordingly. And my summer vacation is usually weeks 28-30.
Just make sure to turn on week number in your calendar applications, then it might be more useful to you.
Just make sure to turn on week number in your calendar applications, then it might be more useful to you.