Red letter day? what does this mean?

[kanjaniwena]

I have heard of a red letter day and believe it to be good, however when i get a red bill this is not good , can anyone explain?

thanj you

[shaneystar2]

Wikipedia has this to say
http://en.wikipedia.org/wiki/Red_letter_day

[kanjaniwena]

Thank you shaneystar2, guess this means I have to pay my bills.:-o(

[butch and su]

you sum up the problem perfectly, a red letter day is both a good and bad day, it originates from intercourse with a partner whilst menstruating, the good part you got laid, the bad part the mess after, hope this solves your problem