| Deadlines | NAU Summer 3 Week (N3A) May 12 to May 30 | NAU Summer 12 Week (N12) May 12 to Aug 05 | NAU Summer 5 Week - First (N5A) Jun 02 to Jul 01 | NAU Summer 10 Week (N10) Jun 02 to Aug 05 | NAU Summer 5 Week - Second (N5B) Jul 07 to Aug 05 |
| Enrollment (on-line, in-person, by mail) | Mar 10 - May 12 | Mar 10 - May 12 | Mar 10 - Jun 02 | Mar 10 - Jun 02 | Mar 10 - Jul 07 |
| Payment Deadline - 5:00 p.m.: Students enrolled prior to this date without payment will be dropped from classes (enrollment cancellation). | May 09 2008 | May 09 2008 | May 30 2008 | May 30 2008 | Jul 03 2008 |
| Late enrollment fee: Starting today, students who enroll and do not pay within the same day will be charged a $50 late fee (Summer/Winter) | May 12 2008 | May 12 2008 | Jun 02 2008 | Jun 02 2008 | Jul 07 2008 |
| Deadline to add a class without a petition | May 13 2008 | May 21 2008 | Jun 04 2008 | Jun 09 2008 | Jul 09 2008 |
| Credit/Audit - grade option deadline | May 13 2008 | May 21 2008 | Jun 04 2008 | Jun 09 2008 | Jul 09 2008 |
| Petition required to add a class - $25 fee applies | May 14 2008 | May 22 2008 | Jun 05 2008 | Jun 10 2008 | Jul 10 2008 |
| Deadline to drop a class without a "W" grade | May 15 2008 | Jun 02 2008 | Jun 09 2008 | Jun 18 2008 | Jul 14 2008 |
| A/Pass/Fail grade option deadline | May 18 2008 | May 23 2008 | Jun 13 2008 | Jun 13 2008 | Jul 18 2008 |
| Last day for 100% tuition refund | May 19 2008 | May 26 2008 | Jun 09 2008 | Jun 16 2008 | Jul 14 2008 |
| Deadline to withdraw from a class without a petition but with a grade of "W" | May 21 2008 | Jun 27 2008 | Jun 19 2008 | Jul 10 2008 | Jul 24 2008 |
| Petition required to withdraw from a class - $25 fee applies | May 22 2008 | Jun 28 2008 | Jun 20 2008 | Jul 11 2008 | Jul 25 2008 |
| MEMORIAL DAY - UNIVERSITY CLOSED | May 26 2008 | May 26 2008 | - | - | - |
| Deadline to withdraw from ALL classes | May 28 2008 | Jul 26 2008 | Jun 28 2008 | Jul 28 2008 | Aug 02 2008 |
| INDEPENDENCE DAY- UNIVERSITY CLOSED | - | Jul 04 2008 | - | Jul 04 2008 | - |