Can you give more details about what you mean by “days have been randomized”:
“the ‘date’: related to a specific day, it is shared between several stocks (for practical reasons, days have been randomized”
Does it mean that (day 1) can be any day of the week ?
Does it mean that (day 2) is not the day after (day 1) ? (Tuesday after Monday)
Does it mean that if (day 1) is a Monday then (day 1 + 7) is not a Monday ?