"It switches the time from standard time to daylight savings time-- basically adds one hour to the time zone. For example, here in Seattle and standard time zone is -8 UTC. During daylight savings time we are -7 UTC. As I understand…"
Will function in the red box under what circumstances to use, and how to use, I tested three times under the sun's angle and height just undergone little change, others do not see the changes come, Please advise, thank you.See More