Article - CS315667
dateFormatISO service returns unexpected time / time zone combination after recent change in DST policy in ThingWorx
Modified: 08-Jun-2020
Applies To
- ThingWorx Platform 8.0 to 8.5
Description
- dateFormatISO service returns unexpected time / time zone combination after recent change in DST policy in ThingWorx
- Brazil passed a law to scrap daylight saving time (DST) in April 2019
- DST would have expected to start on the third Sunday in October 2019 at 2019-10-20 00:00:00
- The switch to DST did not happen due to the policy change
- See more information for this specific example at https://en.wikipedia.org/wiki/Daylight_saving_time_in_Brazil
- ThingWorx dateFormatISO(myDate) returns BRST (false)
- 2019-10-19T00:00:00.000-03:00
- 2019-10-20T01:00:00.000-02:00
- JavaScript (myDate).toString returns BRT (correct)
- Sat Oct 19 2019 00:00:00 GMT-0300 (BRT)
- Sun Oct 20 2019 00:00:00 GMT-0300 (BRT)
- Note that the timestamp itself is correct (01:00 GMT-02:00 = 00:00 GMT-03:00), but the formatted time / time zone combination is wrong
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