Our 10th Anniversary "Blogging From A to Z April Challenge"  by Jeremy Hawkins
Most of the time if you subtract Sundays from April, you then have 26 days--one day for each letter of the alphabet. When April 1st lands on a Sunday you begin on that day which will be the only Sunday you would post during that month's challenge. Using this premise, you would start beginning April First with a topic themed on something with the letter A, then on April second another topic with the letter B as the theme, and so on until you finish on April thirtieth with the theme based on the letter Z. It doesn't even have to be a word--it can be a proper noun, the letter used as a symbol, or the letter itself. The theme of the day is the letter scheduled for that day.