chrono 0.4.44 is a date and time library implementing timezone-aware and timezone-naive types, strftime-style formatting and parsing, and local timezone resolution. No findings were identified. The 11 unsafe sites are narrow and correctly bounded; the historical localtime_r thread-safety issue (RUSTSEC-2020-0159) is resolved since 4.20 via pure-Rust TZif parsing. Arithmetic overflow is handled via checked arithmetic throughout.