Age on Specific Date
Compute how old someone will be on a future (or past) date, given their birthdate.
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Discover exactly how long you have lived: years, months, days, hours and weeks since your date of birth.
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Calculate gestational age in weeks and days from the last menstrual period (LMP). Track the pregnancy week by week with precision.
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Convert dates between the Gregorian calendar and Rata Die (Reingold/Dershowitz), the serial number used in bibliography and history systems.
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Convert dates between fiscal week (4-4-5, 4-5-4, 5-4-4) and Broadcast Calendar (NABBA, week starts on Monday), with adjustable fiscal year.