localDayIndex function

int localDayIndex(
  1. DateTime local
)

Days since 1970-01-01 of the local calendar date of local (flips at local midnight; exact on the web).

Implementation

int localDayIndex(DateTime local) =>
    DateTime.utc(local.year, local.month, local.day).millisecondsSinceEpoch ~/
    Duration.millisecondsPerDay;