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


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

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

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