Google Chrome	61.0.3159.8 (Official Build) dev (64-bit)
Platform	9756.2.0 (Official Build) dev-channel

let us look into updating the logic to reflect your system's time format. thanks for catching that!

Thanks for filing this! I think I was just following the mocks.

Demo: 

Deleted: hour_format.mp4 1.0 MB

	hour_format.mp4 1.0 MB View Download

nice! thanks much Ahmed ;)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9273eec5071b984031165255abe832e1d5f58753

commit 9273eec5071b984031165255abe832e1d5f58753
Author: Ahmed Fakhry <afakhry@google.com>
Date: Sat Jul 29 03:44:27 2017

[Night Light][MD-settings]: Night Light slider should respect 24-hour setting

Make the Night Light slider respect the 24-hour time format setting and
format times shown in knobs label bubbles and legends accordingly.

screenshot: https://screenshot.googleplex.com/09rZyfHxdzx.png

BUG= 749288 
TEST=manually, closure compiler.

Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ibb99b0b32029f7c047700ad82258583017439a16
Reviewed-on: https://chromium-review.googlesource.com/590177
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490609}
[modify] https://crrev.com/9273eec5071b984031165255abe832e1d5f58753/chrome/browser/resources/settings/device_page/night_light_slider.html
[modify] https://crrev.com/9273eec5071b984031165255abe832e1d5f58753/chrome/browser/resources/settings/device_page/night_light_slider.js
[modify] https://crrev.com/9273eec5071b984031165255abe832e1d5f58753/chrome/test/data/webui/settings/device_page_tests.js

Approving merge to M61 Chrome OS.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/382bdac3d5bcadfff9714e1ab79a4d0b841a657f

commit 382bdac3d5bcadfff9714e1ab79a4d0b841a657f
Author: Ahmed Fakhry <afakhry@google.com>
Date: Mon Jul 31 23:27:29 2017

[Merge to M61][Night Light][MD-settings]: Night Light slider should respect 24-hour setting

Make the Night Light slider respect the 24-hour time format setting and
format times shown in knobs label bubbles and legends accordingly.

screenshot: https://screenshot.googleplex.com/09rZyfHxdzx.png

TBR=stevenjb@chromium.org
BUG= 749288 
TEST=manually, closure compiler.

(cherry picked from commit 9273eec5071b984031165255abe832e1d5f58753)

Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ibb99b0b32029f7c047700ad82258583017439a16
Reviewed-on: https://chromium-review.googlesource.com/590177
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#490609}
Reviewed-on: https://chromium-review.googlesource.com/595152
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#199}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/382bdac3d5bcadfff9714e1ab79a4d0b841a657f/chrome/browser/resources/settings/device_page/night_light_slider.html
[modify] https://crrev.com/382bdac3d5bcadfff9714e1ab79a4d0b841a657f/chrome/browser/resources/settings/device_page/night_light_slider.js
[modify] https://crrev.com/382bdac3d5bcadfff9714e1ab79a4d0b841a657f/chrome/test/data/webui/settings/device_page_tests.js