SnakeLegs

While looking at the time conversion methods in .NET, I was surprised by this entry in the .NET Date and Time FAQ:
Q: “Does the .NET Framework support time zone conversions to any given time zone?”
A: “People are often surprised why this feature cannot be supplied by Microsoft at low cost. In particular, data to do conversions exists [...]

[Read more →]

These are the five computer time protocols I recommend providing. For SNTP/NTP, use OpenNTPD (note: if you’re using Solaris 10, check this page for using OpenNTPD Portable with SMF).
SNTP v. 4
RFC 2030
UDP port 123
NTP v. 3
RFC 1305
UDP port 123
Daytime
RFC 867
TCP/UDP port 13
Time
RFC 868
TCP/UDP port 37
TAICLOCK
http://cr.yp.to/proto/taiclock.txt
UDP port 4014

[Read more →]

From the OpenBSD at(1) man page: 
[at(1)] accepts times of the form HHMM or HH:MM to run a job at a specific time of day. (If that time is already past, the next day is assumed.)  You may also specify midnight, noon, or teatime (4pm) and you can have a time-of-day suffixed with “AM” or “PM” for [...]

[Read more →]

Book recommendations:
Marking Time: The Epic Quest to Invent the Perfect Calendar is a very good read; add it to your list. Then, if you’re in the mood for deeper reading, try the more scholarly and austere History of the Hour : Clocks and Modern Temporal Orders, which covers the evolution of timekeeping to regulate and [...]

[Read more →]