In French, there are several expressions using the verb "être" when you wish to talk about timeliness.
How to use 'être' to express timeliness in French
Look at these sentences:
Notice that to say that you are late/early/on time in French, you use the expressions:
(être) en retard
(être) en avance
(être) à l'heure
See also Expressing timeliness in French - late/early - precise
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