All but five Hawaii post offices will be open on Christmas Eve, but 57 offices will shorten their retail lobby hours on that day. Regular mail delivery out of those offices on Thursday will be unaffected by the changes.

Two small postal facilities serving Pearl Harbor Naval Base, the Tripler and Fort Shafter post offices, and the Kukuihaele office on the Big Island will be closed on Christmas Eve. Those five offices do not provide delivery service.
 
In order to accommodate customers hoping to pick up mail after retail lobbies close on Christmas Eve, most offices will have normal will call operations throughout the afternoon. Specific revised hours will be posted at each post office. To obtain the phone number of a specific Post Office, customers can call 800-ASK-USPS.
 
All post offices will be closed on Christmas. Regular post office hours and mail delivery will resume on Saturday. 
 
The list of Post Offices with adjusted Christmas Eve hours is below. Most of the offices listed below will be closing at noon. Exceptions are noted in parentheses. Offices not listed will be open normal hours.
 
Aiea
Aina Haina
Airport - Honolulu (closes at 4:30 p.m.)
Ala Moana (closes at 4 p.m.)
Anahola
Captain Cook
Downtown Station
Ewa Beach
Fort Shafter (closed all day)
Haiku
Hana
Hanalei
Hauula
Hawaii Kai
Hickam
Holualoa
Honaunau
Honokaa
Kahuku
Kailua
Kailua-Kona
Kaimuki
Kalaheo
Kamuela
Kamuela-Waikoloa
Kaneohe
Kapaa
Kapaau
Kapolei
Keaau
Kealakekua
Kekaha
Kihei
Koloa
Kukuihaele (closed all day)
Kula
Kurtistown
Lahaina - Main
Lahaina - Downtown
Laupahoehoe
Makawao
Makiki
Moiliili
Mountain View
Nanakuli (closes at 3 p.m.)
Ocean View
Pahoa
Papaikou
Pearl City
Pearl Harbor MOU 1 (closed all day)
Pearl Harbor MOU 3 (closed all day)
Pepeekeo
Pukalani
Schofield
Tripler (closed all day)
Uptown
Wahiawa
Waialae Kahala
Waialua
Waianae
Waikiki
Waipahu