Calendar
10 tools 4 AI tools
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Tools10
RT-CHN-015 24 Solar Terms Reference (二十四节气)
Year → 24 节气 exact dates + times
Chinese Culture & Almanac
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RT-CHN-011 Chinese Age Calculator (Nominal & Actual)
虚岁 / 实岁 dual age
Chinese Culture & Almanac
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RT-CHN-030 Chinese Date Format Converter (中文日期格式)
4 formats: standard / written / lunar / 干支
Chinese Culture & Almanac
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RT-CHN-108 Chinese Reign-Era Converter
Convert a Chinese reign date such as 光緒二十三年五月初五 to a Western date, or find every era in use on a Western date
Chinese Culture & Almanac
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RT-CNV-087 Date Add/Subtract Calculator
Date arithmetic + day of week
Converters & Units
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RT-CNV-085 Date Difference Calculator
Days/months/years between dates
Converters & Units
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RT-CNV-101 Japanese Era Converter
Reiwa, Heisei, Shōwa, Taishō and Meiji dates to Gregorian and back — exact at every changeover
Converters & Units
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RT-CHN-010 Lunar / Solar Date Converter
Bidirectional Gregorian ↔ Chinese lunar
Chinese Culture & Almanac
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RT-CHN-013 Tian Gan Di Zhi Converter (天干地支)
Any date → 60甲子 stem-branch
Chinese Culture & Almanac
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RT-CNV-088 Week Number Calculator
ISO 8601 + US week numbering
Converters & Units
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AI tools4
BeforeSunset AI
Turns your to-do list into a time-blocked calendar, with focus timers.
AI Directory
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Motion
AI calendar that schedules your tasks, inside a growing project-management suite
AI Directory
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Notion Calendar
Notion's free calendar, formerly Cron, linking events to Notion pages
AI Directory
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ADHD-built AI assistant unifying notes, email and calendar
AI Directory
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