Only on Tuesdays, sometime on Onedays, but never on Threesdays

By the power vested in me, I declare the day following Martin Luther King Day, January 14th to be a new holiday. From this day forth it shall be known as Two's Day, for the reason that 2 days off are better than one. (It totally doesn't have anything to do with it being after a Monday).

In honor of this grand announcement, every day following in a multiple of seven (7, 14, 21, etc) shall be reverently referred to as Twosday (note the lack of apostrophe and single-wordness), or, for those who wish not to be declared insane, Tuesday.

I hope you all both three enjoy this holiday; I'm giving you the day off.
Just tell everyone Eddy said so.