Guides
How to check a calendar connection yourself
A short method for separating a durable pattern from a coincidence.
Write the exact claim
Start with the two month-and-day dates. Ask whether the claim is about this year, every year or the original days of birth. A precise question prevents three different kinds of comparison from becoming confused.
Count complete weeks
For a permanent standard-group comparison, first check that both dates belong to January 1–February 28 or both belong to March 1–December 31. Count the elapsed days between the dates. If the result is divisible by seven with no remainder, they have the same weekday within every calendar year.
Try the boundaries
Check your answer in both an ordinary year and a leap year. If a claim crosses February, a single successful calendar example does not prove permanence. Do not wrap December into January of a different year: that introduces a year boundary and a different comparison.
Check the underlying facts too
Correct arithmetic cannot repair an incorrect birthday. A public-figure discovery needs a reliable date source as well as a valid calculation. If a date is disputed, the uncertainty should remain visible instead of being removed for a more dramatic story. When sharing, link the explanation as well as the result so your friend can see both the evidence and the calculation.
Always Happens editorial draft · calendar claims are covered by automated tests; human editorial review is required before public launch.