I'm a ISP network engineer, and across all teams working on the same platform we have agreed on Read-Only Friday. //

Yep, never start/continue/work on a project on a Friday. Or Monday... //

We have a strict "no live deployments on a Friday".

And if a Friday happens to be a public holiday, the rule then applies to the preceding Thursday instead. //

The last day of the working week is virtual or logical Friday, even if it's not calendar Friday.

All Friday rules still apply!