Before NTP there were Time and Daytime
Read OriginalThis article discusses the Daytime and Time protocols (RFC 867 and RFC 868) that preceded NTP for network time synchronization. It provides a personal historical account of using network time on early Macs, then details the Time Protocol's simple mechanism (port 37, 32-bit seconds since 1900) and its limitations (1-second resolution, no delay compensation, Y2K36 rollover). It also covers the Daytime protocol's human-readable but ambiguous format. Aimed at tech enthusiasts and historians, it offers insights into early internet-era timekeeping practices.
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