public async Task GetDaysUntilHoliday([Remainder][Summary("Name of the holiday to get a countdown for.")] string holidayName)
{
var now = DateTime.Now;
var holiday = await _holidayService.GetHolidayByName(holidayName, "US", now.Year);
var daysUntilHoliday = holiday.Date.Subtract(now).Days;
if (daysUntilHoliday > 0)
{
await ReplyAsync($"There are {daysUntilHoliday} days until {holiday.Name}.");
}
else
{
await ReplyAsync($"{holiday.Name} was {daysUntilHoliday * -1} days ago.");
}
}