method

Date.diff_days

Date.diff_days(a, b) -> int

The number of whole days from b to a (that is, a - b). Negative when a precedes b.

Example

program Demo {
  handler Step phase Update {
    let gap = Date.diff_days(Date.new(2026, 1, 1), Date.new(2025, 1, 1))   # 365
  }
}