Can I say "a four days' seminar"?

[eeshu]

I know it's perfect to say "a four-day seminar" and "four days of seminar". But can I say "This was a four days' seminar" or "It's a two hours' ride from here"?

 

[J&K Tutoring]

No.

 

[Rover_KE]

... and it's not perfect to say 'four days of seminar'.

 

[eeshu]

... and it's not perfect to say 'four days of seminar'.

Isn't it acceptable to say "We had four days of seminar"?:-o

 

[Rover_KE]

It's not colloquial in my experience.

You can say 'We had four days of seminars'.