This pattern marks a continuous range from A to B, emphasizing that something happens throughout that span, not just at the endpoints. It's common with time (e.g., seasons, hours) and place (e.g., areas along a route). For example, '春から夏にかけて' means 'from spring through summer', suggesting a period that covers both seasons. Unlike 'から〜まで', which focuses on endpoints, にかけて highlights the entire stretch as a whole. It often appears in written or slightly formal contexts, but you'll hear it in news and daily talk about weather or events. When the range is about time, it usually implies a duration that passes gradually, like '朝から夜にかけて' (from morning to night). For places, it can describe a geographical spread, like '東京から大阪にかけて' (from Tokyo to Osaka, along the way).