How can I change the time zone of a variable of type DateTime ?
The idea is to do a routine where the user does not need to change the computer time to perform NF-e transmissions, but it is dynamic without having to punch the current time zone in the code.
According to the taxpayer guidance manual, Sefaz does adopt daylight saving time. Therefore, you should enter the time zone -03: 00 when it is not in daylight saving time and -02: 00 when you are (considering Brasilia time).
Example of the dhEvento tag on page 81:
Data e hora do evento no formato AAAA-MMDDThh:mm:ssTZD
(UTC - Universal Coordinated
Time, onde TZD pode ser -02:00 (Fernando de
Noronha), -03:00 (Brasília) ou -04:00 (Manaus), no
horário de verão serão -01:00, -02:00 e -03:00. Ex.:
2010-08-19T13:00:15-03:00.
Link of the manual: link
One problem that can happen is that in windows there is the option Ajustar automaticamente para o horário de verão
(Considershippingtimeasnow,2:00p.m.)
Ifthisoptionisnotchecked,andyourscheduleiscorrect,youwillsend14:00onthe-03:00timezoneandthemachinewillreceiveat2:00p.m.onthe-02:00timezone.Therewillberejection.
Thecorrectoneistheoptionmarked,andthesendingwillbeinthe-02:00spindle,evenifitsspindleis(UTC-03:00)Brasília.
Ididsometesting:
Windowsspindle(UTC-03:00)Brasilia,uncheckedoption:
Console.WriteLine(DateTime.Now.ToString("yyyy-MM-ddTHH:mm:sszzz"));
Result: 2017-11-08T14:05:55-03:00
Windows spindle (UTC-03: 00) Brasilia, marked option:
Console.WriteLine(DateTime.Now.ToString("yyyy-MM-ddTHH:mm:sszzz"));
Result: 2017-11-08T14:03:34-02:00