Does the `dateTime()` Function in GROQ Require the `Datetime` or `Date` Data Types?

does anyone know if the

dateTime()

function in GROQ requires the

Datetime

data type, or can it be used with just the

Date

type? I’m getting a null response trying to run the following query

*[_type == "exhibition"]{ "dateTIme": dateTime(startDate) }

where startDate is a

Date

type.
I’m trying to compare two

date

in order to return a specific document within a certain range of dates

It looks like

dateTime

only accepts RFC3339 format strings like:

1985-04-12T23:20:50.52Z

. I was able to get it to work if I did this though:

dateTime(<date-field> + 'T00:00:00Z')

ty! I forgot you could use strings in groq like that!

There's so much GROQ can do that it's easy to forget stuff 😅