Overview
A uniquely geeky milestone.
1 Billionth Second Calculator
Find the exact date and time you will be (or were) exactly 1 billion seconds old.
Billionth Second
Epoch milestone marker.
The 1 Billionth Second Milestone
Sep 09, 2021
1:46:40 AM
Already happened!
Next Half-Birthday
July 1o, 2026
In 125 days