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EV-T09Standalone tool

Age calculator

Calculate completed years, months, days, and total elapsed days on a chosen date.

EV-T09

Calculate age exactly.

See completed years, months, days, and total elapsed days for any as-of date.

Formula and assumptions: Calendar age borrows the actual length of the preceding month. Total days are elapsed UTC calendar days, avoiding daylight-saving-time drift.

READYEnter a scenario, then calculate.
Method reference: NIST time and frequency ↗