Billionth birthsecond note: For billionth birthsecond observance, first use the 5. Forward Interval calculation form below to determine when your billionth birthsecond will occur, then run the 1. CountUp calculation at that time to watch your personal odometer roll over.
Author: Jerry DePyper
Spanish consultant: Isaac Abraham Martínez Rizo
Current release: 2.4.110
Revision date: Jan 11, 2020
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