import 'package:flutter/material.dart'; extension IsSameDay on DateTime { bool isSameDay(DateTime other) => year == other.year && month == other.month && day == other.day; DateTime nextWeekday(int day) => add(Duration(days: (day - weekday) % DateTime.daysPerWeek)); DateTime withTime(TimeOfDay time) => copyWith(hour: time.hour, minute: time.minute); TimeOfDay toTimeOfDay() => TimeOfDay(hour: hour, minute: minute); bool isSameDateTime(DateTime other) { var isSameDay = this.isSameDay(other); var isSameTimeOfDay = (toTimeOfDay() == other.toTimeOfDay()); return isSameDay && isSameTimeOfDay; } bool isSameOrAfter(DateTime other) => isSameDateTime(other) || isAfter(other); }