How to say "One day at a time" in romaji


Good Evening, I'm a beginner in Japanese and stack exchange. I'm probably
going to ask you all very simple and phrase based questions, so I am happy to
give any points or perks of appreciation that I can, as long as you teach me.
Anyway, I know how to say one day in Japanese romaji (Aru hi), but I was
wondering if someone could teach me how to say "One day at a time". Is there
an extension of Aru hi, or is it just some other phrase. Please let me know.
Thanks




I think a simple one is 一日一歩｛いちにちいっぽ｝ which in romaji is _ichinichi ippo_.
This literally means "one day one step" and it bears the meaning of "one day
at the time" in English.

There is as well another way to express a similar meaning with
一日一日{いちにちいちにち}を着実{ちゃくじつ}に. In romaji _ichinichi ichinichi wo chakujitsu ni_.
This is a bit hard to translate literally as chakujitsu means "steady, sound".
The particle ni turns the noun before it in an adverb, so it could be "one day
one day (day by day) steadily", that after all means "one day at the time" as
well.

By the way, "aruhi" (ある日、。。。) means more "one day" in the sense of "One day...
something happened" .. or like in a novel could be "Once upon a time". It does
not mean "one day" in the sense of counting days (like one, two, three days
etc). (i.e., "on a certain day")

