Set time manually or thru GPS data

Hi,

I have a problem to set the date-time,
while GPS is getting TimeStamp(and location) but is not able to set it on the host.
The /var/log/messages are stating Invalid format.

Then I have tried with simple date -s and it also does not want to change it(Invalid format).

How to set the time, haven’t found any manual way?

I am using the latest image:
v3.5.1/chirpstack-gateway-os-full-raspberrypi0-wifi-20210917164613

Could it be possible that this is a problem on a system layer level(base-layout)?

Thanks in advance for any information about this topic.

BR, Ziga