Do so by tapping the grey gear icon that's on one of your Home screens or in a folder named "Utilities.";
, It's in the third group of options.
, It should turn grey, meaning that Night Shift will no longer automatically enable or disable itself.


If this switch is already grey, skip this step.
 It will turn green, and your display will shift to a softer brown color.
Open your iPhone's Settings.
Tap Display & Brightness.
Select Night Shift.

,
Slide the Scheduled switch left to the "Off" position.
Slide the Manually Enable Until Tomorrow switch right to the "On" position.
{"src": "wikihow-all_test", "title": "How to Manually Enable Night Shift on an iPhone"}