Hi Product Hunt! I'm sharing Chinese Gender Predictor, a free way to explore the traditional Chinese gender calendar. The main challenge was making the inputs and calendar conversion clear. You enter a regular birthday and an estimated conception date, or use a due date. The result shows the lunar age and month used in the chart, and the method page explains our chart source and leap-month convention. There is also a lunar age calculator that compares traditional age with completed Gregorian age, plus 2026/2027 calendars and five original printable party games in A4 and US Letter. Dates and calculations stay in the browser. Optional analytics requires consent and does not collect calculator inputs or results. The chart is a cultural guessing game, not a medical prediction; the accuracy page links to the research. I'd welcome feedback on the date inputs, explanations, and printable games.

Chinese Gender Predictor

Explore the lunar gender chart, with dates kept private

Explore the lunar gender chart, with dates kept private