# RecencyBoost **`class RecencyBoost`** recency_boost | Make recent documents more relevant - Rank on squirro Item’s native date fields “item_created_at”, “modified_at”, “created_at”. - Or by any Label of type date_time (by using the internal name of the Label) For explanation on decay function see: [https://www.elastic.co/blog/found-function-scoring#decay-functions-in-elasticsearch](https://www.elastic.co/blog/found-function-scoring#decay-functions-in-elasticsearch) **`pydantic model PluginConfig`** Fields - `date_field (str)` - `decay (float)` - `offset (str)` - `origin (str)` - `query_score_mode (squirro.lib.search.relevancy.interface.QueryScoreMode)` - `scale (int)` **`PluginConfig.plugin_name: ClassVar[str] = 'recency_boost'`** Used to register and reference the plugin within a query. **`field PluginConfig.date_field: str = 'item_created_at'`** Datetime field to use for recency boosting (with support for datetime facets by name) **`field PluginConfig.decay: float = 0.3`** Gaussian decay factor **`field PluginConfig.origin: str = 'now'`** Origin of pivot function. Datetime or now **`field PluginConfig.scale: int = 730`** Gaussian decay applied to range of days **`field PluginConfig.offset: str = '0'`** Date range syntax. Boosting value of 1 from origin to offset. Decay is applied between offset to scale **`field PluginConfig.query_score_mode: QueryScoreMode = QueryScoreMode.sum`** Whether this boost should be applied in an additive or multiplicative manner. Only applicable on the query stage.