Based on the search results, it is not possible to determine which religious holiday is today. However, there are several resources available that provide calendars of religious holidays and observances for various faiths. These calendars can be used to determine which religious holidays are coming up or have recently passed. It is important to note that some religious observances begin at sundown the evening before the date listed, and that some holidays are based on the lunar calendar, which can cause the dates to vary from year to year.