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D = JDN - Correlation (days since Maya epoch). Long Count splits D into baktun.katun.tun.uinal.kin. Tzolkin number = ((D+3) mod 13)+1; Haab position = (348 + D) mod 365.
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| Tzolkin | 10 Chuen |
|---|---|
| Haab | 14 Zotz |
| Days since Maya epoch | 1,871,811 |
| Elapsed (360-day years) | 5,199 years, 171 days |
| Julian Day Number | 2,456,094 |
Convert any date between the proleptic Julian and Gregorian calendars via the Julian Day Number. Supports AD/CE and BC/BCE eras with exact integer math.
Convert Hijri (Islamic lunar) dates to the Gregorian calendar using the tabular method. Supports Standard, Kuwaiti and Fatimid leap-year rules over a chosen period.
Convert weight between metric (kg/g) and avoirdupois pounds and ounces in either direction. Exact 1 lb = 0.45359237 kg. Free, universal mass converter.
Convert length between metric (meters, centimeters) and imperial yard-pound units (yards, feet, inches) both ways. Exact universal conversion factors.
Compute Fajr, Sunrise, Dhuhr, Asr, Maghrib, Isha and Islamic midnight for any location and date range, plus the Qibla direction, using the praytimes.org algorithm.
