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Rule "wrong preposition with times 'on (at) 7:30 p.m.'"

This is one of many errors that LanguageTool can detect.

Description: wrong preposition with times 'on (at) 7:30 p.m.'
Message: Did you mean <suggestion>at</suggestion>?
Category: Grammar (ID: GRAMMAR)
Incorrect sentences
that this rule can detect:
  • She came on 7:30 p.m.
    Correction suggestion: at
  • She came on 7 p.m.
    Correction suggestion: at
Correct sentences
for comparison:
  • 1,500 workers are on the job, starting as early as 5 a.m. to avoid the 110-degree afternoon heat.
  • I have an 8:00 a.m. meeting tomorrow.
ID: AT_TIME [1]
Version: 6.8-SNAPSHOT (2025-10-24 22:33:07 +0200)