to open the alarm page quickly,swipe down from the top-right side of the notifications bar, then tap the "alarm" icon tap the "apps" icon tap the "clock" icon tap the "alarm" icon tap the "add" icon
Android night mode, set the time of the alarm tap "ok" you can change the settings of the alarm here tap "repeat" to enable/disable the recurrence
tap the weekday you want to repeat or not tap the "alarm sound" icon choose the sound you want and tap "ok" tap/slide the switch to switch on/off the alarm long tap the alarm you want to delete
tap the "delete" icon tap the "options" icon tap "night mode" to enter night mode tap the screen once to exit