[hornychz]

- Since the pi3 has no RTC module I found a procedure to initialise the right time zone, but it's something you need every time the power is off.. have to think about it.

Hi,

and congratulations.

I think on the Linux machines is the best way to synchronize the time to use the NTP (= network time protocol).

With Raspbian you can use configuration tool "raspi-config" and in the point "4 Internationalisation Options" choose "I2 Change Timezone". (But - I don't recommend you to change locale if you aren't expert in Linux!) This is the first step.

Second step: you can edit the file /etc/ntp.conf
Maybe you already have some servers in it:
server 0.debian.pool.ntp.org iburst
server 1.debian.pool.ntp.org iburst
server 2.debian.pool.ntp.org iburst
server 3.debian.pool.ntp.org iburst
This pool is maybe enough for you, but there are better servers (higher stratum and close to you). You can find them in Google, for example for Europe:
NTP servers in Europe
(I'm used to use CESNET servers: tik.cesnet.cz and tak.cesnet.cz.)
And after possibly changes in it you can check step three.

The third step is to check, if ntp daemon is starting during boot time. You should have some symlinks to ntp start script in directories /etc/rc3.d and /etc/rc5.d, for example "@S02ntp". Another check is to start command:
/etc/init.d/ntp status
Correct answer is: [ ok ] NTP server is running.

If there is something wrong, let us know.

If it is OK, you get very exact time normal, more accurate then normal PC with Windows ... Good luck!