[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Time](https://evolu.dev/docs/api-reference/common/Time) › DurationLiteralYears

```ts
const DurationLiteralYears: union(
  templateLiteral(Digit1To99, "y"),
  templateLiteral(Digit1To99, ".", Digit1To9, "y"),
);
```

Defined in: [packages/common/src/Time.ts:484](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Time.ts#L484)

Years duration: `"1y"` to `"99y"` or `"1.1y"` to `"99.9y"`. See
[DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/variables/DurationLiteral).