Guides
Practical examples and notes for using NibCat tools. These pages support the tools; they are not a separate blog.
Date & time
how to
How to Convert UTC to Local Time in Excel, Google Sheets, JavaScript, and SQL
Learn the practical ways to convert UTC timestamps to local time, when a fixed offset is safe, when daylight saving time breaks simple formulas, and how to check results with a time zone converter.
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How to Use the Days From Today Calculator
Learn how to calculate a date after or before today, when to use days instead of months, which copy format to choose, and how to avoid common date-counting mistakes.