11. It was a red - letter day when she finally received her graduation diploma 12. My father said that the day i was born was a red - letter day for him 13. The young woman was dressed in red because it was a red - letter day for her 14. This is a red - letter day for me . i first received a check for my magazine article 15. In the medieval calendar there were two kinds of day - dismal days and red - letter days 16. Yesterday was a red - letter day for me because a long - lost friend came to visit me 17. This is a red - letter day for susan , she made her first sale to a very important client 18. Well , then it ' s a red - letter day ! you ' ve been going out at night with your friends so much lately 19. This is a red - letter day for susan . she made her first sale to a very important client 20. D : well , then it ' s a red - letter day ! you ' ve been going out at night with your friends so much lately