Your calendar belongs to you and no one else. Your job does not control it. Your school does not control it. Not even your children control it.
Sure, if you value those things, you will give them the time they require, but be clear they do not own you.
You have a choice about where you spend your time. Don’t let people bully you into their schedule, plan, or agenda because it helps them.
Seek God’s direction, talk to the people impacted most by your choices, and then decide the best way to spend your time.
Maybe it is going to work and giving a full 8 hours of work, but perhaps it is taking a day off so that you can do something that fills your soul.
Maybe it is signing your children up for another activity, or perhaps it is telling them no so that you can spend more time together as a family.
Your life results from your choices; if you don’t like it, choose differently.