[{"data":1,"prerenderedAt":79},["ShallowReactive",2],{"page:type=alarm&slug=4-00-am&locale=en":3},{"locale":4,"alternates":5,"title":8,"description":9,"h1":10,"lead":11,"breadcrumbs":12,"sections":21,"faq":47,"related":57,"updated":73,"tool":74,"schema":76},"en",{"es":6,"en":7},"\u002Falarma\u002Fa-las-4-00","\u002Fen\u002Falarm\u002F4-00-am","Set an alarm for 4:00 AM ⏰ online alarm clock","Free online alarm set for 4:00 AM: switch it on and it rings in your browser. Plus the best bedtimes (8:15 PM for 7.5 h of sleep) and tomorrow's sunrise.","Alarm for 4:00 AM","Online alarm clock set for 4:00 AM.",[13,16,19],{"name":14,"path":15},"Home","\u002Fen",{"name":17,"path":18},"Alarm clock","\u002Fen\u002Falarm",{"name":20,"path":7},"4:00 AM",[22,26],{"paragraphs":23},[24,25],"This alarm will ring at 4:00 AM with the sound you choose. Going to bed at 10:00 PM gives you 6 hours of sleep; Going to bed at 11:00 PM gives you 5 hours of sleep; Going to bed at 12:00 AM gives you 4 hours of sleep.","Tomorrow in New York the sun rises at 07:16 AM, 196 minutes after the alarm.",{"heading":27,"paragraphs":28,"table":30},"Bedtimes to wake up at 4:00 AM",[29],"Waking at the end of a ~90-minute sleep cycle helps you feel rested. These bedtimes include 15 minutes to fall asleep:",{"head":31,"rows":35},[32,33,34],"Go to bed at","Cycles","Hours of sleep",[36,40,44],[37,38,39],"6:45 PM","6","9",[41,42,43],"8:15 PM","5","7.5",[45,46,38],"9:45 PM","4",[48,51,54],{"q":49,"a":50},"How do I set an alarm for 4:00 AM?","The alarm on this page is already set for 4:00 AM. Switch it on, choose a sound and keep the tab open: it rings at 4:00 AM by your device's clock.",{"q":52,"a":53},"What time should I go to bed to wake up at 4:00 AM?","To complete 90-minute sleep cycles, go to bed at 6:45 PM (9 h of sleep), 8:15 PM (7.5 h) or 9:45 PM (6 h), allowing 15 minutes to fall asleep.",{"q":55,"a":56},"Will the alarm ring if my screen turns off?","The browser must stay open. On mobile, enable \"Keep the screen on\" or keep the tab visible while charging.",[58,61,64,67,70],{"label":59,"path":60},"Alarm for 4:15 AM","\u002Fen\u002Falarm\u002F4-15-am",{"label":62,"path":63},"Alarm for 4:30 AM","\u002Fen\u002Falarm\u002F4-30-am",{"label":65,"path":66},"Alarm for 4:45 AM","\u002Fen\u002Falarm\u002F4-45-am",{"label":68,"path":69},"Alarm for 5:00 AM","\u002Fen\u002Falarm\u002F5-00-am",{"label":71,"path":72},"Timer","\u002Fen\u002Ftimer","2026-10-22T19:31:18.733Z",{"time":75},"4:00",{"app":77},{"name":10,"category":78},"UtilitiesApplication",1792697478718]