@tsugitelabs

Tsugite Labs

@tsugitelabsJoined October 2026

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Tsugite Labstsugitelabs.hashnode.dev2 posts

Japanese holidays and business days in JavaScript, no holiday API

Add one business day to Friday, 18 September 2026 for a customer in Japan and the answer is Thursday, 24 September. Monday the 21st is Respect for the Aged Day, Wednesday the 23rd is Autumnal Equinox

5h ago · 16 min readtsugitelabs.hashnode.dev

Japanese text in JavaScript: what normalize('NFKC') fixes, what it breaks, and how to format era dates

A Japanese user types ＡＢＣ１２３ into your search box. Your database has a record called ABC123, but the search finds nothing. Their bug report says "ABC123 finds nothing", because to them the two strings

20h ago · 17 min readtsugitelabs.hashnode.dev

Tsugite Labs

About

Available for

Tsugite Labs's blogs

Japanese holidays and business days in JavaScript, no holiday API

Japanese text in JavaScript: what normalize('NFKC') fixes, what it breaks, and how to format era dates

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Tsugite Labs

About

Available for

Tsugite Labs's blogs

Japanese holidays and business days in JavaScript, no holiday API

Japanese text in JavaScript: what normalize('NFKC') fixes, what it breaks, and how to format era dates