
um is one of the A1 words in the free course — with this picture, the audio, and spaced repetition.
um
at (clock time)
/ʊm/Examples — um in a sentence
Der Unterricht beginnt um neun Uhr.
The class starts at nine o'clock.
Wir essen immer um halb sieben.
We always eat at half past six.
How to remember it
UM sounds like 'oom'. 'OOMPH! The clock strikes NOON, AT this exact time!'