Missing payments. If you don't see a recent payment you've made, make sure you've allowed enough time for the payment to post to your account: Payments made by electronic check, by credit card, at a T-Mobile store, or over the phone usually post to your account right away, but it can take up to three hours.
Nothing in-game uses Kerbin days/years as far as I can tell. A day is defined as 86400 seconds, and a year as 365 days.
A year has 365 days divided into 12 months in the modern day Gregorian calendar. Each month has either 28, 30 or 31 days during the common year. Calendar with 12 months. Nearly every 4 years is a Leap Year with 366 days because we add an extra (intercalary) day at the end of February, the Leap Day on 29 February.ach month has either 28, 30 or 31 days during the common year. Calendar with 12 months. Nearly every 4 years is a Leap Year with 366 days because we add an extra (intercalary) day at the end of February, the Leap Day on 29 February.