Be a good/bad timekeeper
Definition 1 of 1
Pro Tip 1/3Context Matters
The term is often used in work and social situations where punctuality is valued. 
As an event organizer, being a good timekeeper is essential for your reputation.
Pro Tip 2/3Emotional Impact
Calling someone a bad timekeeper can imply irresponsibility or disrespect for others' time. 
My boss highlighted the importance of punctuality by saying, 'Don't be a bad timekeeper.'
Pro Tip 3/3Cultural Significance
Timekeeping can be more or less important in different cultures; some may not use this term much. 
In some cultures, being a 'bad timekeeper' might not carry a stigma.