The time on Howland Island, in the IDLW time zone, is the latest on the globe. Therefore, the day ends AOE when it ends on Howland Island. You can check the time on Howland Island using this AOE Time Reference.
You can also use a link to find your local time at day's end AOE. This may vary, depending on your local use of Summer Time (Daylight Savings Time). Sample charts are provided here for each: