The Renton Highlands Post Office, 4301 NE 4th St., will be open from 10 a.m. to 3 p.m. this Sunday, Dec. 20 to serve customers who have yet to complete their holiday mailings. Full retail service will be available.

The Postal Service recommends keeping the following mailing and shipping deadlines in mind:

Dec. 15 – Standard Post

Dec. 19 – First-Class Mail and Global Express Guaranteed

Dec. 21 – Priority Mail

Dec. 23 – Priority Mail Express