A simple implementation of daytime protocol (RFC 867) in pure x86_64 assembly using nothing but Linux syscalls.
It may not be the fastest implementation (I'm 100% sure it isn't), but it's good enough for me.
$ nasm -f elf64 daytime.a -o daytime.o
$ ld daytime.o -o daytimeThis project is released to the public domain according to UNLICENSE. You may do whatever you want with it.