simple english question

It is CORRECT!

"is having " can have two meanings:
1.present continuous tense
2.Future tense

In your sentence, "is having" belongs to FUTURE TENSE .

Future tense have three expressions:
1.will ________
2.be going to _______
3.be______+ing
4. (present tense)

Meaning
1.will ____
-you think of some idea at the same time you say.
-It will not happen definitely.
sentence: I will be angry if you laugh at me!

2.be going to______
-It must happen
-It have planned before you say it.
-emphasis on the action
Sentence:
1.Look! This man is going to fall.
2.Miss Cheung is going to attend a course on Monday.

3.be ____+ing
--It must happen
-It have planned before you say it.
-emphasis on time
Sentence:Miss Cheung is attending a course on Monday.

4.(present tense)
you may think that why the expression of future tense can be present tense. It can be used in:
-It is a PLAN such as a timetable, calendar etc.
sentence:2A students have a CIT lesson after the recess.


Your teacher think that it is future tense because of the words "On monday".


The sentence can be:
1,on monday,the computer club was having a special meeting to test some new software.<-----past continuous tense if monday is in the past
OR
2.on monday,the computer club is having a special meeting to test some new software.<--------future tense if monday is coming.

It is correct.
' is having' is used as future tense here, the same as "will have"

yes , it is a bit strange for this question.

Maybe better like this.

On monday, the computer club will have a special meeting to test some new software.

or

the computer club is having a special meeting....

(just igore "on monday")