On wedding invitations, etiquette authorities agree, the year is traditionally written as text. It is for this reason, I suppose, that some authorities think to address capitalization of the year. However, there is no consensus. It is more common to see the advice to capitalize the first word of the year (only). Most Google search results for [ capitalize year wedding etiquette ] give this advice.
Mesa County, Colorado (CO) County population in 2014: 148,255 (87% urban, 13% rural); it was 116,255 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 29,788. County owner-occupied free and clear houses and condos in 2010: 11,718. County owner-occupied houses and condos in 2000: 33,306.
The city and county of Denver is the second largest county by population, home to 600,158 people as of the 2010 U.S. census. It is followed by Arapahoe County, with 572,003 people; Jefferson County, with 534,543 people; and Adams county, with 441,603 people. The smallest county by population is San Juan County, with a population of 699.