If you put them in a sealed container on Monday, they should still be perfectly fine by Friday. Hard-boiled eggs keep pretty well in the fridge - around 7 days without any problem. The important thing is that they're sealed up so they don't absorb odors from other foods and stay fresh.
Now, there's a detail people usually overlook: the state of the shell. If you peeled them already when you stored them, those definitely won't last as long - maybe 4 or 5 days max - because they lose that natural protection. The ones that still have their shell intact will easily last those seven days or even a bit longer. So if yours still have the shell on, you're good. Peel them when you're about to eat them.
What's definitely worth doing is giving them a smell before you eat them, especially if quite a bit of time has passed. A hard-boiled egg that's gone bad has a smell you can't mistake, so that's your best indicator. As long as they don't have that strange, strong sulfur smell, they'll be fine.