The Jewish calendar faced challenges in maintaining synchronization between the lunar and solar years. To address this, an intercalary month named Veadar was added approximately every three years, but this created variability in the calendar. As a result, the lunar year could differ significantly, leading to complications when trying to rely on a calendar that did not have a consistent year length.

Sir Robert Anderson's choice to use a Noahadic year of 360 days highlights the difficulty in finding a stable framework. With the Jewish calendar's fluctuations and the need for recalibration with the solar cycle, it was understandable why he would prefer a fixed system. The complexities of the varying year lengths made reliable timekeeping a daunting task.