First recorded by Marilyn Sellars (US #37/C&W #19 1974).
Other hit versions by Gloria Sherry (IRE #1 1978), Lena Martell (UK #1 1979), Cristy Lane (C&W #1/CAN #10/NZ #5 1981).
From the wiki: “‘One Day at a Time’ was written by Marijohn Wilkin and Kris Kristofferson (although Kristofferson was a bit embarrassed with this co-credit; recalls he merely shared the same room while Marijohn wrote it, perhaps helping out with a lyric line one or two). It has been recorded by over 200 artists and has reached #1 in several countries.
“The song was first recorded by Country singer Marilyn Sellars in 1974 and released as a single to modest success. Irish singer Gloria Sherry, performing professionally as ‘Gloria’, recorded ‘One Day at a Time’, releasing it as a single in August 1977. Her recording remained on the Irish charts for the rest of the year, throughout 1978 and well into 1979 – peaking at #1 (over a year after it had first entered the chart) and spent a total of 90 weeks in the Irish Top 30 – the longest run by any song in Irish chart history. Meanwhile, Lena Martell’s 1979 recording topped the UK singles chart.