Cannot set mute start or end timing <10:00 UTC

I have a set of alerts that I’m trying to run once a day in a given time range via mute timings, but anytime I try to set a start or end time time < 10:00 I get an error that reads

“Times must be between 00:00 and 24:00 UTC”

I have the time zone for the mute rule set as UTC, however, so I’m not sure why this error is occurring. I can set any time between 10:00 and 24:00 successfully (so long as start < end).

I’m running Grafana v11.3.0 (d9455ff7db) in Thinger.io, which is the latest version of the plugin in Thinger.

When I check the settings for “timezone”, I find the following settings:

date_formats

  • default_timezone = “browser”

plugin.grafana-image-renderer

  • rendering_timezone = (blank)

Is this a known bug? It seems like Grafana is confused about what time zone I’m in / how it’s determining if the start and end times are in UTC. I searched this forum & the Github issues for “mute time” and “mute timezone” but didn’t find anyone else who seems to have this issue.

Without complete example of the input it’s impossible to say anything definitive.
I guess you want to setup overnight interval. You can do it like this

Ah, sorry, I should have included an input example. Here’s a screenshot showing the error if I try to input a start or end time < 10:00

The ideal mute timing for my application would be (in UTC):
0:00 → 17:00
18:00 → 24:00

However I can’t set any mutes between 0:00 and 9:59 at the moment.

because the format, try 08:00 and 09:00

That fixes it! Thanks Yuriy!

I’ve submitted a feature request to improve this error message for future folks who encounter this: