Timer finished one hour out of sync

[WallyR (Wally)]

You need to format your time.

I can not make the code where I am, but look at the first post in this thread.

How to make template sensor with as_timestamp update regularly?

I use this value as a condition for my Google Home alarm in automation. {{ (as_timestamp(now()) - as_timestamp(strptime(states('sensor.bedroom_speaker_alarm'), '%Y-%m-%dT%H:%M:%S+00:00')))|int }} It tracks how many seconds till alarm triggers. But I would like to make it a template sensor. When I use it as a value_template it doesn’t update. Only after restarting Hassio and then nothing. How should I make it update state?