Browse past themes and the next seven days in a calendar, then submit proposals for day eight onward.
You can submit in Japanese or English. Translation and title normalization will run on submit.
Selected target date
2026/05/22 (金)
The earliest proposal date is 2026/05/22.
When enabled, even if this date is not selected, the proposal can still be reconsidered for another future date with no proposals yet. Anniversary-like dates are avoided.
Add any constraints or intent here. It will also be considered during adoption.
Duplicate history check
Search the last year of official themes for the same idea. Matching entries do not block submission.
Browse past themes and the next seven days, then pick any cell from day eight onward.
Dates from day eight onward are color-coded by whether proposals already exist. Use the count button to open the per-day list.
On phones, the calendar is shown as a daily card list with larger text and tap targets.