Hello Nina, First of all the it is a completed action in a known completed time so you need to use a simple form not a perfect form. Secondly, as a passive sentence, the verb be would take the tense - past simple and the main verb would go to past participle/3rd form. This gives us the following sentence. 'The installation was carried out in March 2014.' 'Carried out' is probably more natural here, if you want to make it more formal you would say 'The 'item' was installed in March 2014.' where you substitute item for the name of the thing that was installed. Hope this helps.

If possible, do you mean to say: "The experience took place in March 2014?" If so, this is referring to when the experience happened. You'd more like to use the active voice, as it's generally liked better in conversation and in writing. When you added in the word "has been" in front of the verb, it changes the tense to the passive voice. Either way, you should use the active voice as best as you can in writing & speaking. Hope this helped a bit. :)

Neither of the two you give sounds right. You could say ' The experience' or, probably better, 'our experience dates from March 2014 ' or 'our experience was in March 2014 '.

I wrote this sentence wrongly.I wanted to say "Installation has been done in March 2014 or Installation was done in March 2014