Android ADB Shell Date and Time Commands

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Set time

adb shell "date HH:mm;am broadcast -a android.intent.action.TIME_SET"

Set date and time

adb shell date MMDDhhmmYYYY.ss;am broadcast -a android.intent.action.TIME_SET

Set time zone

adb shell setprop persist.sys.timezone "America/Los_Angeles"

Print current date and time

adb shell date

Print current time in milliseconds since January 1, 1970 UTC

adb shell date +%s%3N

Print current time in seconds since January 1, 1970 UTC

adb shell date +%s