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2021 SpeedCalendar card is now available!

1. daily technique

2021.01.23

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Special Tools for SpeedCalender are available now!

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1. daily technique

Quick Manual

How to calculate Day of Week

English
Japanese(日本語)
Chinese(中文)

World Record

16.671s @kosaka (5 days single)
DNF (5days average)
DNF (1 minute)

Recent article

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[English/Japanese/Chinese] Available quick manual for calculating day of week (28/56/84 method)
中文版星期几计算视频出来了！ (SpeedCalendar instructional video in Chinese is now available!)

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