"In the olden days" is a phrase that denotes a time gone by, often characterized by traditional values and customs. However, there are many antonyms for this phrase that describe modern times, such as futuristic, contemporary, modern, and present-day. These antonyms highlight the advancements society has made in technology, science, and culture. With the rapid pace of change in this era, one can no longer look back on the past with nostalgia but must embrace the cutting-edge tools and ideas of the present. The antonyms also suggest that the present time will undoubtedly one day be the "olden days" of the future.