If my citizenship process was to take 5 months, does the process start when you send the aplctns?

so i know its supposed to take 5 months cause i already checked on the website but my question is am i supposed to count that 5 months starting the da

so i know its supposed to take 5 months cause i already checked on the website but my question is am i supposed to count that 5 months starting the day we sent the applications/the day they sent a letter that they recieved it or the day that we have been residents in the united states for 5 years?
i need to leave the country to take care of a lot of things and i am in the middle of the citizenship process. (have to wait for the letter that states the interview's date) and i cant stay wait for a long time for this cause im going through a lot of emotional damage being here and need to leave asap. please someone inform me of my options and the question i had earlier about counting the dates!!!

or:so i know its supposed to take 5 months cause i already checked on the website but my question is am i supposed to count that 5 months starting the day we sent the applications/the day they sent a letter that they recieved it or the day that we have been residents in the united states for 5 years? i need to leave the country to take care of a lot of things and i am in the middle of the citizenship process. (have to wait for the letter that states the interview's date) and i cant stay wait for a long time for this cause im going through a lot of emotional damage being here and need to leave asap. please someone inform me of my options and the question i had earlier about counting the dates!!!

or:it would be the day they have acknowledged they got the application thats when it started and thats how they do things would also be the start when they mailed you the letter acknowledgeing they got your paperwork it leads up to them saying we recieved the application and they notified you they have it i would let someone know you have to leave the country and why

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