The phrase "a valid date" is correct and usable in written English.
It can be used when referring to a date that is acceptable or recognized as legitimate, often in contexts like programming, data entry, or event planning.
Example: "Please ensure that you enter a valid date in the form before submitting it."
Alternatives: "an acceptable date" or "a legitimate date".
Almost all of the patients, 99.7%, have a valid date of birth filled in, and 98.5% of them have at least one address entered.
Out of 517 patients who do not have a valid date of birth, 10 records were returned with a reference to "date of birth" in their correspondence notes.
Patients were regarded as having received radiotherapy if a valid date of radiotherapy treatment within 6 months of diagnosis was recorded.
Our secondary outcome of vaccine uptake in pregnancy requires a valid date of vaccination for a participant to be considered vaccinated.
Additionally, patients had to be permanently registered with a CPRD participating practice and have a valid date of birth and gender information (acceptable patients).
A delivery was defined as an episode of care that included a relevant OPCS4 code R17-R255) or ICD10 code O80-O844) for the mode of delivery, or a maternity tail with a valid date of birth for a baby.
These test results provide convincing evidence that varnish microstratigraphy, once radiometrically calibrated, can be used as a valid dating tool to estimate surface exposure ages of desert landforms in the western US drylands.
We repeated all analyses after reassigning exposure status based on the last dose number for which there was a valid dose date occurring before the index date, analogous to the "third dose assumption" used to estimate coverage of primary course vaccines in children.
But, unbeknownst to us, Mr. Haines was again fighting for our rights, declaring that "the valid date [for a 2013 marriage license to a Pennsylvania same-sex couple] would be the date that the marriage ceremony occurred".
I defined a 'completed study' as one for which a valid completion date had been entered on CTG, either under the field 'Completion Date', or when this field was left blank, the 'Primary endpoint completion date'.
Inputs to the MEFP comprised "raw" precipitation and temperature forecasts from the frozen (circa 1997) version of the NWS Global Forecast System GFSS) and a climatological ensemble, which involved resampling historical observations in a moving window around the forecast valid date ("resampled climatology").
