Ussher's date of creation of October 23, 4004 BC appears to rely upon two questionable assumptions. One assumption concerns conformity with an expected 6000 years of history. Because we are now well into the seventh millennium after Ussher's date of creation, this assumption appears to be void. The other assumption concerns the coincidence of the creation with Rosh Hashanah, which would require that the moon was at a particular phase on that date. However, there is question as to whether the moon was at the appropriate phase on that date. Furthermore, it would not be possible to ascertain the date from the moon's phase on the calendar that Ussher proposed that the ancient Hebrews used. Absent these two assumptions, there is no compelling reason to insist upon the precise Ussher date of creation, so biblical creationists are free to explore alternate dates of creation, within the limits of biblical chronological information, if determination of the precise date is even possible.