Why do some journals show coverage to "1 year ago"?It is a fairly common practice for scholarly journal publishers to place an "embargo" -- a restriction on access to the full-text of their journal covering a specific time period - on subscriptions to that journal that come through academic database publishers like EBSCOHost. Generally, such an embargo means that while the databases that index the journal will provide abstracts and citation information, the full-text of the article will not be available to Library users during the embargo period.
Embargos usually range from 6 months to 18 months, with 1 year being the most common duration. Note that even if a journal is embargoed, current articles may be obtained via Interlibrary Loan.