Triple Monday 

Triple Monday is actually the Tuesday following a holiday weekend, but a day that has three times the shittiness of a normal Monday, because (1) it's still the first day of the work week, (2) it comes following what's likely an overly relaxed and/or fun weekend thus amplifying the effects, and (3) upon arrival at work you're faced with fitting a full week's work into the four remaining days.

It was a great Memorial Day weekend, but now I'm facing a Triple Monday when I get back to work.

Triple Monday by theswizzle May 28, 2015

Triple Monday 

A Triple Monday is the first Monday in January. It is the Triple Monday because it is the First Monday of the Week, First Monday of the Month and the First Monday of the Year.

Triple Monday was particularly difficult this year because New Years day was on a Sunday.

Triple Monday by Deepthoughts75 January 3, 2022