You have 90 days from the date your passport was issued to report that you have not yet received it in the mail. If you do not report the non-receipt of your passport within 90 days of the issue date, you will be required to reapply and submit the full passport fee.
The best time of year to see the Northern Lights in Iceland is between the months of September and March. To be in with a really strong chance to witness the northern lights a cloudless, clear sky is the main requirement with the outside temperature being cold but dry.
Your best chance to see the northern lights is during the cold, clear winter nights between September and April. The prime time to see them in all their glory in usually after midnight. Be spontaneous, brave the cold, and embrace a late night adventure to see the stunning natural phenomena Alaska is known for.