The Handy Calendar

What day of the week is it? For calendar calculating like savant syndrome.

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UPDATE

2018

01.27
Added "Mathematical Proof of Perpetual Calendar" in the Proof page.

2017

12.26
Handy Calendar support page updated.
12.23
Tutorial updated.
11.09
Added simulation program in the Procedures page.
11.08
Added new Tutorial.
11.08
Added “Standard” in the ARCHIVES page.

2016

05.09
Added “Light" in the ARCHIVES page.

2015

11.06
App support page “Sum Day” added.
08.10
Added “Extreme" in the ARCHIVES page.
08.03
Added "Pro" in the ARCHIVES page.
07.28
Added “Beginner” in the ARCHIVES page.
07.15
Added proof for "Mutant (tentative)".
07.13
ARCHIVES page added.
05.28
PROOF page updated.

Change how to link to the paper.

04.16
Simulation program updated in procedures page.
04.13
Add INTRODUCTION page.
04.01
The practice application updated.

Changed the date notation.

03.31
Inquiry form updated.

2014

12.05
Site renewal.