Reading
Short, specific articles about how computers actually handle time — the parts that quietly break software, and the tools that fix them.
Fundamentals
From sundials to the Unix epoch — why we count time the way we do.
Three systems for the same thing, and why they quietly disagree.
The one-second bug that has taken down real production systems.
Why the map of timezones keeps changing under your code's feet.
For developers
The seconds-vs-milliseconds mistake, and why it's so easy to make.
The date format you should probably already be using.
What's really happening when a schedule string triggers a job.
Excel's 1900 bug, Mac's 1904 epoch, and other quiet inconsistencies.
The trick behind messages that show the right time for everyone.
Practical
The specific ways DST breaks schedules, logs, and duration math.
Two overflow bugs, a generation apart — and what changed in between.
A practical checklist for storing and displaying time correctly.