Function Updated 17 Oct 2026

`isDateTime(value)`

Checks if the value is a date/time, or text that can be read as one. Text is first parsed with .NET's general date parser (invariant culture), so this accepts more formats than isDate — including plain dates such as 2023-01-01 and US-style dates such as 01/31/2023.

Parameters

valueobjectrequired

Value to try to check if is a datetime that can be converted

Returns

True if the value is or can be converted to a datetime.

Example

Normal JavaScript, running in the browser or on the Docly™ server.

let text = "2023-01-01T13:45"; // a datetime
let text2 = "20230101"; // not a datetime

if (docly.isDateTime(text)) {
    console.log("Text is a datetime!");
}
if (!docly.isDateTime(text2)) {
    console.log("Text2 is not a datetime!");
}

/*
    Formats supported:           
      "yyyy-MM-ddTHH:mm:ss.FFFFFFFZ",  // Full ISO with timezone
      "yyyy-MM-ddTHH:mm:ssZ",          // ISO with seconds
      "yyyy-MM-ddTHH:mmZ",             // ISO without seconds
      "yyyy-MM-ddTHH:mm:ss.FFFFFFF",   // Full ISO without timezone
      "yyyy-MM-ddTHH:mm:ss",           // Basic datetime
      "yyyy-MM-dd HH:mm:ss",           // Space separated
      "yyyy-MM-dd HH:mm"               // Basic datetime without seconds

*/