Greetings.
A-variants are examples with "on the following days" from https://www.quora.com/Should-it-be-in-the-following-days-or-on-the-following-days.
B-variants are mine where I replaced "on" with "in".
(1a) On the following days, 2nd, 3rd and 5th March, we will be closing early.
(1b) In the following days, 2nd, 3rd and 5th March, we will be closing early.
(2a) The clinic will only be open on the following days: December 2nd, December 4th and December 6th.
(2b) The clinic will only be open in the following days: December 2nd, December 4th and December 6th.
(3a) This information is for all the new students. I want you to take note that on the following days, namely Monday and Friday, I will expect you to attend Choir practice in the student union and after that there will be coffee for all the students.
(3b) ... I want you to take note that in the following days, namely Monday and Friday, I will expect you to attend Choir practice in the student union ...
Are all b-variants also correct?
Is it right to say that any sentence which is correct with "on the following days" would also be correct with "in the following days"?
Thanks.
When talking about days, it's always "on". "in" is wrong. It happened on these days: Wednesday, Thursday and Friday.
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When talking about days, it's always "on".
"in" is wrong.
It happened on these days: Wednesday, Thursday and Friday. / We should go on Monday. / They had dinner there on January 3.
However, if you have already mentioned a particular day, and you want to say 'during the following days after that day' without naming specific days, you can use 'in':
They arriv