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2026.06.282026.07.11

New APP is available now! Check it out!

1. Service 3.1 Speed Cube Timer

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What is SpeedCalendar

SpeedCalendar is a mental training activity in relation to Calendar system. We compete our speed (time) to calculate the day of the week.

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55th 2026/06/14 (Sun) 16:00-16:30 (Japan Standard Time, UTC +0900)

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Another New APP is available!
New APP is available!
SpeedCalendar Print is now available!
元号変換方法（Gengo – Western Year conversion method）

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1. Service5
2. Technique3
- 2.1 Kurukuru Method1
3. Timer5
- 3.1 Speed Cube Timer3
- 3.2 Other Timer2
4. Workshop8
- 4.3 Japanese8
5. Publish8
- 5.1 Manual5
- 5.2 Video4
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- 1. daily technique8
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