UTC+01:24 is an identifier for atime offset from UTC of +01:24. InISO 8601 the associated time would be written as 2026-02-17T06:55:16+01:24.
The time corresponding to that offset was thelocal mean time at theWarsaw meridian and was also known asWarsaw mean time.
Since the early nineteenth century, it was commonly used for timekeeping purposes in the lands of the formerPolish–Lithuanian Commonwealth.
On 5 August 1915,Warsaw switched toCentral European Time,[1] and the rest of Poland followed suit on 31 May 1922.[2][3]