Link

Page Title

Subject Matter

BirthCalc

Buckner's Birthdate Calculator

Compute birth from death and age
in any day / month / year format.

HodSearch

Links to all known Hod records
posted at RootsWeb.

Calendar

Perpetual Calendar

Calendars

Deciphering Different Dates

Julian vs Gregorian? Feast Days? etc.
Actual dates, notes, even the time!