public static DateTime GetFivePmYesterday(ITimeProvider timeProvider = null)
{
if (timeProvider == null)
{
timeProvider = new SystemTimeProvider();
}
DateTime today = timeProvider.Today().ToUniversalTime();
DateTime fivePm = new DateTime(today.Year, today.Month, today.Day, 17, 0, 0);
TimeZoneInfo estTz = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
TimeSpan offset = estTz.GetUtcOffset(fivePm);
DateTimeOffset dto = new DateTimeOffset(fivePm, offset);
if (dto.UtcDateTime > timeProvider.Now().UtcDateTime)
{
dto = dto.AddDays(-1);
}
return(dto.LocalDateTime);
}