In "the False Prophet", it is argued that if a "time" is 1000 years, then a "season" is one quarter of that, or 250 years. If a "season and a time" is 1250 years, then to the nearest year, it is the average of 1260 years using the solar calendar, and 1260 years using the 360 day calendar. (The latter equates to 1241.9 solar years.) Therefore, I suggest the 1250 years is not an approximation of 1260 years, but a precise number allowing for the fulfilment of "times, time and half a time" using either (or both) the solar and 360 day calendars.
