Comparing
2KB immutable date time library alternative to Moment.js with the same modern API
Lightweight TypeScript ORM with SQL-first design, zero magic, and edge-runtime support.
| Metric | dayjs | drizzle-orm |
|---|---|---|
| Ecosystem | npm | npm |
| Difficulty | Intermediate | Intermediate |
| Weekly downloads | 43.9M↑ | 1.9M |
| Latest version | v1.11.20 | v0.33.0 |
| Recipes | 1 | 2↑ |
dayjs only
Shared
drizzle-orm only
Use Day.js when you need date parsing, formatting, arithmetic (add/subtract days/months), or comparisons in browser code where bundle size matters. Its plugin system covers timezones, relative time ('3 hours ago'), duration, and ISO weeks.
Edge runtimes (Cloudflare Workers, Vercel Edge), projects where you want full SQL control with types, lighter bundle size than Prisma, serverless environments.
For complex timezone-aware calendar applications, consider Temporal (the upcoming TC39 proposal) or date-fns with explicit timezone handling. Day.js's plugin system can grow large if you need many features.
If you prefer Prisma's schema-first DX and Studio. Complex ORM features like polymorphism. Teams more comfortable with ActiveRecord-style ORMs.
dayjs
drizzle-orm