The calendar sometimes considers July 31 an invalid date

[eriktorbjorn]

If you keep turning the desk calendar, you'll eventually read July 31 and that's the end of it.

But you can also try:

>READ JULY 31
Why?  Is it your birthday?
It is open to July 7.
The only listing here is an appointment with Baxter at 2PM at the Robner Corp.
office.

>TURN TO JULY 31
Thirty days hath September,
April, June, and November,
All the rest have 31???
George is to the east, heading toward the east.

That's because it checks <G? ,P-NUMBER 30> in two places in DESK-CALENDAR-F.

(The "31" in the response to "TURN TO JULY 31" is the number you used. If you "TURN TO JULY 1000" it will ask "All the rest have 1000???" instead.)

[eriktorbjorn]

By the way, it would be nice it it accepted "TURN CALENDAR TO JULY 31", but apparently that's not valid syntax.