On 23/03/2021 07:31, Harry Bloomfield wrote:
Dave Plowman (News) has brought this to us :
Many these days use the car radio RDS
signal.

Mine does - always correct ;-)

My landline phone system maintains the time and date, for logging any
calls and displays the time when 'parked'. It doesn't get used very much
and I notice it drifts quite a lot. That syncs itself with any incoming
or outgoing call.

You could always dial 17070 and select the ringback test.
That updates your phone or caller-id box with the correct time