Perpetual Calendar — 400 Years of Memory

Automatically adjusts for months with 28, 30, and 31 days AND accounts for leap years. Set it once, and it won't need correction until the year 2100.

🧠 MECHANICAL GENIUS

100-200+ additional components beyond the base movement. The 48-month cam takes 4 years to complete one rotation.

📊 CALENDAR HIERARCHY

• Simple Date: Just the date. No intelligence
• Annual Calendar: Knows 30/31 day months. 1 correction/year
• Perpetual Calendar: Knows everything including leap years. 1 correction per century
• Secular Perpetual: Accurate for 400 years

⚠️ THE BIG WARNING

If a perpetual calendar stops, DO NOT adjust the date between 8 PM and 2 AM — the calendar gears are engaged. Service cost: $1,000-5,000+.