An event is something specified by space and time,
Your birth is an event if it declared by the place and the time.
Why do we measure time ?
How is time most important?
How do you measure time ? Name all devices used
What Instruments do you use to measure small units of time?
What Units do you use to define time?
1year = 365.249 days
How to determine the date for Easter
time zones and global time stories