Absolutely; it's the day Christ died for our salvation.
Which gives Friday symbolic significance.
If someone forgets fast or abstain on Friday, do it on Tuesday or Monday. It's not a sin.
Besides, the fish markets need business EVERY DAY OF THE WEEK to stay open.
Abstaining from meat is no chore to me; I much prefer an ahi Tuna to Angus Beef any day of the week.