Julius Caesar's Year of Confusion
Roman calendar quirks—like September through December no longer matching their original numeric roots—spark a broader look at how Julius Caesar’s reforms, including a one-off 445‑day “Year of Confusion,” evolved into today’s leap-year system. Commenters trace how months were renamed (not added), why the year eventually shifted from starting in March to January, and how religious, political, and practical needs have repeatedly reshaped calendars. The thread also highlights the modern fallout: from incompatible historical dates and national calendar changes to the surprising complexity of encoding dates, leap years, and time zones in software.
Roman month names and year start
- Many note that September–December embed Latin numbers (7–10) that only align if the year once started in March.
- This also makes February-as-leap-month more intuitive: the extra day goes at the “end” of the old year.
- Thread discusses that Romans eventually shifted the legal new year to January, possibly tied to changing inauguration dates for consuls and the symbolism of Janus.
- Some commenters question how solid the “year started in March” story is, noting inconsistent ancient sources and possible “just-so” explanations.
Julius Caesar’s “Year of Confusion”
- Discussion revisits Caesar’s role as pontifex maximus, responsible for intercalation, and how neglect and politics led to a badly misaligned calendar.
- Commenters highlight that he imported expertise from Egypt; an inclusive-counting misinterpretation initially caused leap years every three years.
- One note says the calendar was already ~2 months off before Caesar’s Gallic campaigns, so blaming him alone is disputed.
Month renaming and political ego
- July and August weren’t added but renamed from numerical months; other emperors considered or attempted further renamings.
- Comparisons are drawn to modern political renamings of months.
- Several posts appreciate cultures whose month names describe seasons or agriculture (e.g., Slavic languages), though these no longer align uniformly with the Latin-based months.
Calendar reform schemes
- Multiple proposals: start the year at the spring equinox; treat Feb 28/29 as “non-week-days” to create a perpetual calendar; adopt 13 × 28‑day months; or use systems like the International Fixed Calendar or Solar Hijri.
- Enthusiasts like the alignment with natural cycles and simpler, repeating structures.
- Skeptics emphasize enormous social, religious, and technical costs, predicting a “Y2K v2” transition.
Religion, politics, and time
- Several comments stress that unbroken 7‑day cycles are central to Abrahamic religions, making non-week days or drifting rest days unacceptable.
- Historical and modern calendar choices (e.g., Orthodox vs Gregorian, Ukrainian reforms, British March/April corner cases) are presented as deeply political.
Programming and practical complexity
- Leap-year logic is used as a classic beginner trap; commenters debate whether the 400‑year rule is “complete” and mention longer-term corrections.
- Strong consensus: always use established libraries for dates/time due to leap seconds, time zones, and centuries of shifting rules.