[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
type DurationLiteralYears = `${Digit1To99}y` | `${Digit1To99}.${Digit1To9}y`;
```

Defined in: [packages/common/src/Time.ts:275](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Time.ts#L275)

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