Of, relating to, or belonging to time long past; old or ancient: olden days. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "olden" in a sentence
"On the way back from swimming, I mentioned that - in olden times - sailors couldn't always swim, which took us to press gangs, and Nelson's navy."
"It's funny how many men in olden times had feminine-sounding names."
"Back in olden times, say the early 1990's, a time of linear media and a small clutch of manageable news outlets, candidates routinely pivoted right (in GOP primaries) and left (in Democratic primaries) knowing that for the general election they could slide towards the center to build the winning coalition of their own party faithful, plus independents and a sprinkling of disaffected voters from the other party."