We’d love to reconnnect with this children’s book we had from our local library, but despite extensive online searching, can find no trace of it, as cannot remember or even guess at the title.

Illustrated short children’s book from c. 1990, for readers perhaps 5 – 9. The young heroine (age 8-ish, possibly called Anna) is not good at timekeeping, and is often late for tea. She therefore observes that ‘time is [like] a monster, marching on’. She meets the clock-keeper of the town hall clock, asks him about the nature of time, and he kindly on one occasion puts the clock back about 5 minutes, so that she does not seem late home for tea. The story and pictures have a mainland European feel to it. Someone suggested it may have been set in Switzerland. It is almost certainly a translation into English, and the English has that sense of maintaining a foreign idiom.
If this resonates with anything you recall, we will be overjoyed!