The phrase "a specified day" is correct and usable in written English.
It can be used when referring to a particular day that has been identified or designated for a specific purpose or event.
Example: "The meeting is scheduled for a specified day next month, which will be communicated to all participants in advance."
Alternatives: "a designated day" or "a particular day".
Here's the way it works: An organization does a mailing inviting members to shop at Bloomingdale's on a specified day.
Participants were invited to participate through a personal letter requesting them to attend a survey center on a specified day, fasting, between 7 30 and 11 00 am.
Phone calls were made to participants once per week on a specified day and the call for that week was not repeated if the participant did not answer.
In order to limit selection bias (ie, selective enrolment of vaccinated children), participating centres were asked to enrol ILI cases on a specified day of the week (up to three or four consecutive cases per week) blind to vaccination status.
This is facilitated by asking the patient to use a multicompartment dispenser with clear plastic cover, through which each compartment holding tablets for a specified day of the week can be seen.
A piloted, standardized questionnaire, with both definite and open-ended questions, was distributed to all registered medical students (from 1 st to 7 th year of medical education) on a specified day, during agreed lecture periods, in April and May of 1999 (see Figure 2).
If built on one of the upcoming Metacoin platforms like Counterparty, these tokens can be made "callable" at a contractually specified price on a contractually specified day.
To control for this, we limited our analysis to respondents who performed an operations-based exercise using the designated exercise scenario, on the specified day.
Unless otherwise specified, Day 1 data were used for the item psychometric analyses.
During the specified day, participants performed their normal daily activities; however, they were requested to abstain from cycling or driving a vehicle during the test period.
Most Program Directors specified day shifts as the shift exposed to VANA students; although three directors reported placing students on other shifts as well.
