Last night, my one-month-old iPhone 6s alarm went off at 2:33 AM?

I, in no possible way, set an alarm for 2:33 AM. I woke up confused, and snoozed the alarm. I went into my clock, and sure enough, there was a set alarm for 2:33 that I never created. Has this ever happened to you?

Someone had played a prank with you and if you think there's any problem with your mobile, you need to perform a hard reset and If you need some advanced security for your device, install LEO Privacy Guard 3.0, it is used for hiding images and videos and also you could use it to lock your favorite apps.