"the preceding days" is correct in written English.
You can use it to refer to the days before a specific day, usually used in narratives or stories. Example: I had been feeling unwell for the preceding days, but on that morning my symptoms worsened significantly.
Unlike the preceding days, when policy seemed to be made on the fly, the negotiations Wednesday moved behind closed doors.
Defoe's desire to help collect a vital three points was such that he spent the preceding days psyching himself up.
THE scene in central Bangkok on the morning of December 4th was a stark contrast to the preceding days.
Despite the momentous events in Eastern Europe and East Germany in the preceding days and weeks, we had not been expecting it.
And: As the hours passed, we replayed each moment of the preceding days in detail, trying to piece together what had happened to Mohammed.
Friends and family members were insistent that Nisman had not seemed depressed before his death, and that he had reported receiving death threats in the preceding days.
Still, the increase was smaller than last year, when the post-Thanksgiving shopping was up 27percentt from the average of the preceding days.
As the hours passed, we replayed each moment of the preceding days in detail, trying to piece together what had happened to Mohammed.
He had listened to all that had been said to him in the preceding days and, indeed, he saw the logic of it.
As far as I understood, Abobaker's integrity was intact, but because of a security scare in the preceding days, odds were high that ISIS was monitoring him.
But the crime quickly became a footnote to the four lives that the attacker, Maksim Gelman, had ended in the preceding days.
