You may be referring to DSTUpdatePan-001.pkg, released as a standalone for 10.3.x in February of this year, and probably bundled anonymously into a 10.4.x SecUpd at some time. Its principal features were given as accommodation of changes in starting/ending times for daylight saving time in various countries. The lack of a specific update for 10.2.x is not altogether startling.
OS 8.1 and lower Macs have always had the advantage of the CP Network Time, given that they can access one of Apple's servers, and auto. time check has been built into OS 8.5 and up, again given a time server. But a server is always a requisite part of the deal, natch.
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