Cherlokrobin ships a dual-calendar sync engine spanning 50,000 years

Cherlokrobin's temporal engine lets developers synchronize dates across two calendar systems over a 50,000-year range, handling the edge cases that standard date libraries ignore entirely. For indie makers building apps that need historical, astronomical, or non-Gregorian date support, this fills a genuine gap without reaching for a bloated dependency. It's a focused, low-level tool that does one hard thing well.