"TD" is the abbreviation for "Tim-hurr'tè's first day", and referrs to the first historically recorded day, on which Tim-hurr'tè snatched the sun from the sky and carried it away. It is believed to be the very first time, as it is described with great shock and worry, and in later passages relief, as Tim-hurr'tè returned it on the next morning.

Because historians on Karsunt concurr that this was probably the first time this phenomenon occurred, it was established as the first day of the Karsunt calendar, making all years marked TD date after that day. Years before that day are noted as a negative number, such as -100TD, which would indicate 100 years before the day Tim-hurr'tè first stole the sun.