Erroneous time returned

[rayshan]

Hello.

Give this METAR:

METAR ZGSZ 210500Z 06003MPS 020V100 9999 SCT033 28/19 Q1016 NOSIG

Obtained from here with a local datetime of Nov 21 2015 1PM, metar.js returns time of Sun Dec 20 2015 21:00:30 GMT-0800 (PST). Is there something special we have to do when dealing with METAR datetime?

[9662]

It appears to be the correct timestamp, no? Apart from the :30 seconds coming out of nowhere.
Note: Aviation reports always use UTC, and 2015-12-20T21:00-0800 is consistent with the METAR timestamp of 210500Z (allowing for the month+year ambiguity).

[rayshan]

@9662 thanks, I didn't know METAR is always in UTC. I assume it's just because Weather Underground is producing METAR with wrong dates? I'd double check but seems like Weather Underground's METAR display is broken right now. Will come back to this later.