DP are the acronyms of the words, "Declaration of Peace". It is a way for the people of Woka to count the time into years. It is the official way of time counting since the Declaration of Peace. The starting year is on 0 DP, when all the ambassadors of all intellect races met, founded Woka and declared eternal peace between them.
The DP is the most reffered kind of time-counting of Woka. However, many different kinds of time-counting were used.