[Considering that no one has ever taken the time to calculate how many days there are in a year, and they don't really have an accurate way to gauge it without a noticeable rotation system or a more defined skyscape.. Kaiba sticks to the most familiar terms for the months all the same, not seeing a need to deviate:
January, February, March, April, May, June, July, August, September, October, November, December]
no subject
January, February, March, April, May, June, July, August, September, October, November, December]