“In the afternoon” or “On the afternoon”?

Last weekend, I helped my grandparents with their trip to . On Saturday morning, together with my grandparents, I searched the Internet for the train schedule, the weather in , and some hotel information. In the afternoon, I went to the train station and managed to buy two tickets for my grandparents although there was a long queue.
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Comments  (Page 2) 

Yes, it's "in the afternoon".

the affirmation is quote of life time and.

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