[1] Interoperability Enhancements, 2014-01-31 07:20:46 +09:00 https://www.web3d.org/documents/specifications/14772-1/V2.1/index.html

date

A single date/time, or a date/time range, defining the valid time period that the data pertains to. Dates are specified in the format "YYYY MM DD [HH:MM]". Years in the current time period should be specified using four digits, e.g. "1999" or "2001". Years can have other than 4 digits and can be negative. A date range is specified by supplying two values separated by a "-" character. An optional time can be supplied should this level of accuracy be required. Times are to be specified in 24-hour format with respect to GMT. For example, "1999 01 01 00:00 - 1999 12 31 23:59".

[3] VRML97, ISO/IEC 14772-1:1997 -- 6 Node Reference, 2014-01-30T22:20:50.000Z, 2025-11-07T08:57:08.658Z https://www.web3d.org/documents/specifications/14772/V2.0/part1/nodesRef.html#TimeSensor

[4] Extensible 3D (X3D), ISO/IEC 19775-1:2023, 8 Time component, 2024-01-30T06:15:38.000Z, 2025-11-07T08:41:29.995Z https://www.web3d.org/documents/specifications/19775-1/V4.0/Part01/components/time.html

[2] ISO/IEC 19776-2:2015 — Classic VRML encoding — 5 Encoding of fields, 2016-06-01T19:19:55.000Z, 2025-11-07T08:44:44.437Z https://www.web3d.org/documents/specifications/19776-2/V3.3/Part02/EncodingOfFields.html#SFTime