"varying days" is a correct and usable part of a sentence in written English.
You can use it when talking about days that differ from each other. For example, "We have to attend online classes on varying days throughout the week."
The houses are open on varying days and at varying hours from March through December.
Obon in Japan is usually celebrated like a family reunion and holiday rolled into one, in mid-August (some parts of Japan celebrate Obon in July, or on varying days according to the lunar calendar).
Each of the first series' episodes were made available on varying days of the week at 8.30pm via EastEnders official website, starting on 8 January 2010 and ending on 25 January 2010, though all episodes remain available online.
Given the repeated surveys undertaken of the hospital over varying days and 3 months, it is likely that our findings are representative.
In order to ensure a representative sample of patients from these centers, interviews were conducted on varying days and times of the week including week ends.
This is likely due to varying days of death among animals, as some fish died early in the trial (having less time to grow) and some survived the entire trial period.
Interviewers gauged participant fatigue and suggested breaks where necessary, with time length of interviews varying from days to weeks depending on the complexity of the participants' history [ 26].
The Julian calendar is a solar calendar consisting of 12 months of varying lengths (28 days, 30 days, and 31 days) with a leap day added to February every fourth year (i.e., 29 days instead of 28 days).
The average time between patient's admission and CDI diagnosis was 17 days, varying from one day to a maximum of 72 days.
The median length of stay was higher in the patients with ARF, being 6 days, varying from 3 to 65 days, while in the patients without ARF the median was 2 days, varying from 1 to 33 days (P < 0.001).
The mean duration of an acute episode was relatively homogeneous between countries, varying from 6.5 days to 7.4 days, apart from Spain (10.8 days).
