Palmiest

Be eloquent in praise of the very dull old days which have long since passed away, And convince 'em, if you can, that the reign of good Queen Anne, was Culture's palmiest day.

Source: wiktionary

Unfortunately, even in the palmiest days of the old Cockermouth, Keswick & Penrith Railway Company, passengers were few and far between at Troutbeck, and since the advent of the motor bus road services they are rarer than ever, and never likely to increase.

Source: wiktionary