1. Compare it to a reliable time source. This could be:
* Another watch: Compare it to another watch that you know is accurate.
* A phone or computer: Most phones and computers have accurate clocks.
* An internet time server: Websites like time.gov or worldtime.com provide highly accurate time.
2. Observe the watch over a period of time. Watch the second hand for a while to see if it's moving smoothly and consistently. If it's skipping or moving too fast or slow, your watch may need adjusting.
If you find your watch isn't keeping time, you can:
* Adjust the time: Many watches have a crown you can turn to adjust the time.
* Get it serviced: If your watch is mechanical, it may need to be serviced by a watchmaker to keep it running accurately.
* Replace the battery: If your watch is quartz, a dead battery can cause it to lose time.