The structure から~にかけて is used to express a range or span – either in time or space – from one point to another. It translates roughly as "from … through …" or "from … to …" in English.
A key nuance of から~にかけて is that the boundaries are not precisely defined. Unlike から~まで, which marks exact start and end points, から~にかけて implies a gradual or approximate range. It is used when describing phenomena that spread across an area or persist over a stretch of time without sharp cutoffs.
Used to describe something that occurs over an approximate period of time.
Used to describe something that extends across a geographical area or physical space.
The phrase にかけて modifies the rest of the sentence. When it directly modifies a noun, にかけての is used: