In the Didache, it tells us "8:2 but keep your fast on the fourth and on the preparation day (Friday)."
Assuming that some actually did keep these weekly fasts, when exactly did they begin and end?
Did they eat Tuesday supper and not eat again until Wednesday supper?
Or did they eat Tuesday supper and end the fast the morning of Thursday so that no food was consumed Wednesday?
Or Wed morning to Thur morning etc?
I reckon the times of these fasts were in line with the twice weekly fasts of the Jews who did theirs on Monday and Thursday.
Can anyone provide more clarity on this?