solana-clock is used at run time in 229 crates (of which 8 optionally). It is a direct run-time dependency in 2 crates. It's used only as a dev dependency in 15 crates (of which 3 directly).

Depender (with downloads and own rev deps) solana-clock version
1.4M 546 solana-program =2.1.0
4.0K 22 solana-feature-set =2.1.0
4.4K 2 solana-epoch-schedule dev =2.1.0
4.4K 2 solana-rent dev =2.1.0
4.4K 2 solana-fee-calculator dev =2.1.0