In the Bird Leg Cabin's bedroom is a calendar from July 1970. However, the days of the month on the calendar are wrong and are not accurate for July 1970.
In Episode 2, the events in the station is said to of happened around 7:30pm, as Alan's phone shows the time as "7:29pm", yet people in the Sheriffs station and Pat Maine on the radio all claim it is morning. It's been revealed in a forum post that it was a texture mistake.
Alice Wake's driver's license, picked up by Alan when it was left in an old car, was issued in the USA, which organizes date of birth by month/date/year. Alice's license, while difficult to read in game can be seen clearly in the Official Survival Guide, lists her date of birth as 24-11-79 (day-month-year). No US issued license would list a date in this manner.