reminds of

[arzgol]

The picture reminds me of good time that I had with my colleague at hospitals.

Do I need the preposition ''of''?

Thank you for your response.

[emsr2d2]

The picture reminds me of good time that I had with my colleague at hospitals.

Do I need the preposition ''of''?

Thank you for your response.

Yes, you need "of". You also need to either say "of a good time" or "of good times".