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No account, no card, no email address. Everything you type stays in this browser.
Only the date is used — to find which solar term was running. No time, no chart, no prediction.
Used to calculate your daylight change. Pick your country, then your state or province, then your city. If it isn't listed, choose “Other — use my device's timezone” at the bottom of the country list and we'll use your phone or computer's own zone.