# iamkun/dayjs · RepoSense Release & Migration Intelligence

> plugin: timezone plugin prevent RangeError for invalid Day. Drop-in upgrade. Migration: None.

## Metadata
- **Repository URL**: https://github.com/iamkun/dayjs
- **Primary Package**: `dayjs` (NPM)
- **Categories**: `ECOSYSTEM`
- **Latest Version**: `v1.11.23`
- **Semantic Status**: `COMPATIBLE`
- **Bundle Size Impact (unavailable)**: `Size Unavailable`
- **Atom Ingestion Feed**: https://github.com/iamkun/dayjs/releases.atom

## The Human Context (Plain-English Pitch)
dayjs is an open-source library and developer tool in the iamkun/dayjs ecosystem. It saves developers from writing repetitive low-level boilerplate from scratch by providing a battle-tested, open-source implementation ready for production.

## Stage 1 Executive Summary ([Core Change] + [Required Action] + [Migration Effort])
plugin: timezone plugin prevent RangeError for invalid Day. Drop-in upgrade. Migration: None.

## Breaking Changes & Required Actions
- **plugin:** timezone plugin prevent RangeError for invalid Day.js values (#3180) (dad46e6)
- **plugin:** timezone plugin prevent RangeError for invalid Day.js values (#3180) (#3181) (2a3785f)

## Migration Snippet
```ts
npm install dayjs@1.11.23
```

## Ecosystem Compatibility Matrix & Graph Warnings
- **TypeScript 5.x** [`COMPATIBLE`]: Ships standard TypeScript declaration files without type regressions.

## Zero-Noise Release Timeline
- **v1.11.23** (2026-08-17) [COMPATIBLE]: plugin: timezone plugin prevent RangeError for invalid Day. Drop-in upgrade. Migration: None.

## Upgrade & Migration Q&A (GEO Direct Answers)
### Is iamkun/dayjs v1.11.23 safe to upgrade in production?
iamkun/dayjs v1.11.23 is classified as COMPATIBLE (PATCH release). plugin: timezone plugin prevent RangeError for invalid Day. Drop-in upgrade. Migration: None.

### What breaking changes or compatibility risks exist in iamkun/dayjs v1.11.23?
No breaking API changes or peer dependency conflicts are recorded for iamkun/dayjs v1.11.23 in the RepoSense compatibility graph.

### What is the bundle size impact of dayjs v1.11.23?
Measured bundle size telemetry is currently unavailable for dayjs v1.11.23; verify build output locally before deploying.

### How do I upgrade dayjs to v1.11.23?
Upgrade dayjs to v1.11.23 by running "npm install dayjs@1.11.23" and applying the migration steps: npm install dayjs@1.11.23