Google Chrome	70.0.3538.76 (Official Build) (64-bit)
Revision	22757df8a5ddfacf2eaf57b85f4ea54c14b8f87a-refs/branch-heads/3538@{#1031}
Platform	11021.56.0 (Official Build) stable-channel eve
Firmware Version	Google_Eve.9584.160.0

What steps will reproduce the problem?
(1) Navigate to the Settings>Displays>Night Light
(2) Attempt to schedule Night light from 18:00-18:00. 
(3) Attempt to schedule Night Light from 00:00-23:59

What is the expected result?

I can set whatever schedule I desire, even if that means scheduling it all day long.

What happens instead?

There appears to be snapping rules configured to ensure at least 30 minutes per day wherein Night Light is not scheduled.

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If this is a regression (i.e., worked before), please consider using the
bisect tool (https://www.chromium.org/developers/bisect-builds-py) to help
us identify the root cause and more rapidly triage the issue.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.