"When" clause containing future tense

I agree, Mr P. For me...

"OK, OK! Don't pester me so. Saturday is when I will fix the faucet/I will fix the faucet on Saturday. Happy now?"

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"No, I can't meet you on Saturday. Saturday is when I fix the faucet. I promised. It's all arranged."

Hi guys,

I wrote this before I saw the earlier comments, but here it is, anyway.

I've recently learned that the future tense should rarely be used in a "when" or other clause indicating the future, but I know that there are exceptions to almost every grammatical rule; therefore, I have a few examples an am wondering if anyone can tell me if these would be correct or incorrect and why. I realize some of these could be stated in a more economical or practical manner, but I'm just speaking technically.

Saturday is when I will fix the faucet. (sounds correct to me) OK to me. (will' or 'going to')

   According to my understanding of the rule this sentence should be -

Saturday is when I fix the faucet.

   This sounds like I fix the faucet every Saturday, Yes. But it can also suggest that you have already initiated your plan to fix the faucet. eg you bought some tools. which doesn't make any sense unless my faucet is very consistently broken.

6:00 is when I will finish my homework. (sounds correct to me)

   Again according to me understanding, this should be -

6:00 is when I finish my homework.

   This sounds like 6:00 is my regularly scheduled time to do my homework, which could be true, but would completely change the meaning of the sentence. Same comments as the first set of examples.

Any thoughts? You need to consider the context in which you would say something like Saturday is when I will fix the faucet. It's not the most common thing to say.

eg Wife: This faucet is still leaking.          

Me: Don't worry. I'm going to fix it on Saturday.

My pal, (the next day, at work): Hi Clive, do you want to play golf all day on Saturday?

Me: I'd love to, but I can't. Saturday is when I will (I prefer 'am going to') fix the faucet in my kitchen. I promised my wife.

(This is still not a great context for such a remark, but I hope you get the general idea.)

'When' can, of course,  also be followed by 'future' in examples such as these:

When will Tom arrive?

Do you know when Tom will arrive?

Best wishes, Clive

Take a look at this:

All of the following ideas can be expressed using different tenses:

a. Simple prediction
b. Arrangements
c. Plans and intentions
d. Time-tabled events
e. Prediction based on present evidence
f. Willingness
g. An action in progress in the future
h. An action or event that is a matter of routine
i. Obligation
j. An action or event that will take place immediately or very soon
k. Projecting ourselves into the future and looking back at a completed action.

The example sentences below correspond to the ideas above:

a. There will be snow in many areas tomorrow.
b. I'm meeting Jim at the airport.
c. We're going to spend the summer abroad.
d. The plane takes off at 3 a.m.
e. I think it's going to rain!
f. We'll give you a lift to the cinema.
g. This time next week I'll be sun-bathing.
h. You'll be seeing John in the office tomorrow, won't you?
i. You are to travel directly to London.
j. The train is about to leave.
k. A month from now he will have finished all his exams.