incorrect difference in hours while working with DST date

[mukhrr]

The problem
💻 Code demonstrating the problem

import { fromZonedTime, toZonedTime } from "date-fns-tz"
import { add, differenceInHours, parseISO } from "date-fns"

const dstOffset = (value: any) => {
  const zone = "America/Chicago"

  const start = toZonedTime(fromZonedTime(parseISO(value), zone), zone)
  const end = toZonedTime(fromZonedTime(add(parseISO(value), { days: 1 }), zone), zone)

  const diff = differenceInHours(end, start)

  return diff
}

console.log(dstOffset("2024-03-10"))

//=> Expected output
// 23

//=> Problematic output
// 24

🙁 Actual behavior
Output of dstOffset with the above arguments is 24 hours

🙂 Expected behavior
The output of dstOffset with the above arguments should be 23 hours because 2024-03-10 is DST date with America/Chicago (-4) timezone

Debug information
date-fns version: ^3.6.0
date-fns-tz version: ^3.1.3
Browser/Node.js version: node v20.12.2
Your timezone: GMT +5 Tashkent
Your current time: 12:22 pm