Serialize / Deserialize UTC DateTimes before 01-01-1970












0















I am having the following problem. If I serialize Dates since 01-01-1970 and I deserialize them it works as expected. But for dates before 01-01-1970 the deserialization with momentjs doesn't work.



        DateTime dt = new DateTime(2010, 10, 20);
DateTimeOffset dt2 = new DateTimeOffset(dt).ToUniversalTime();
long a = dt2.ToUnixTimeMilliseconds();
Console.WriteLine("value1: " + a); //1287525600000 => moment(1287525600000).toDate() => Wednesday, 20. October 2010 (00:00:00)
DateTime dtfoo = new DateTime(1962, 10, 20);
DateTimeOffset dtfoo2 = new DateTimeOffset(dtfoo).ToUniversalTime();
long afoo = dtfoo2.ToUnixTimeMilliseconds();
Console.WriteLine("value2: " + afoo); // -227239200000 => moment(-227239200000).toDate() => Friday, 19. October 1962 (23:00:00 GMT+01:00)
Console.ReadLine();


I am deserializing the dates just with moment(unixtime).toDate(). The first date is 20-10-2010. The second date is 19-10-1962 (instead 20-10-1962).










share|improve this question


















  • 2





    What do you expect? Unix time is the number of seconds since 1970-01-01 00:00:00 UTC. If you need to represent dates befor this, choose another representation.

    – Klaus Gütter
    Nov 14 '18 at 19:05











  • I am getting this value 19. October 1962 (23:00:00 GMT+01:00) for the date 20. October 1962. I think, I can represent dates before 1970 with Unix time but maybe I should serialize/deserialize the date in a different way.

    – user9923760
    Nov 14 '18 at 19:08











  • So you think the serializer is to blame?

    – None of the Above
    Nov 14 '18 at 19:19











  • I am asking if I can use unix time to represent dates before 1970.

    – user9923760
    Nov 14 '18 at 19:24






  • 2





    stackoverflow.com/questions/31708622/…

    – Flydog57
    Nov 14 '18 at 20:30
















0















I am having the following problem. If I serialize Dates since 01-01-1970 and I deserialize them it works as expected. But for dates before 01-01-1970 the deserialization with momentjs doesn't work.



        DateTime dt = new DateTime(2010, 10, 20);
DateTimeOffset dt2 = new DateTimeOffset(dt).ToUniversalTime();
long a = dt2.ToUnixTimeMilliseconds();
Console.WriteLine("value1: " + a); //1287525600000 => moment(1287525600000).toDate() => Wednesday, 20. October 2010 (00:00:00)
DateTime dtfoo = new DateTime(1962, 10, 20);
DateTimeOffset dtfoo2 = new DateTimeOffset(dtfoo).ToUniversalTime();
long afoo = dtfoo2.ToUnixTimeMilliseconds();
Console.WriteLine("value2: " + afoo); // -227239200000 => moment(-227239200000).toDate() => Friday, 19. October 1962 (23:00:00 GMT+01:00)
Console.ReadLine();


I am deserializing the dates just with moment(unixtime).toDate(). The first date is 20-10-2010. The second date is 19-10-1962 (instead 20-10-1962).










share|improve this question


















  • 2





    What do you expect? Unix time is the number of seconds since 1970-01-01 00:00:00 UTC. If you need to represent dates befor this, choose another representation.

    – Klaus Gütter
    Nov 14 '18 at 19:05











  • I am getting this value 19. October 1962 (23:00:00 GMT+01:00) for the date 20. October 1962. I think, I can represent dates before 1970 with Unix time but maybe I should serialize/deserialize the date in a different way.

    – user9923760
    Nov 14 '18 at 19:08











  • So you think the serializer is to blame?

    – None of the Above
    Nov 14 '18 at 19:19











  • I am asking if I can use unix time to represent dates before 1970.

    – user9923760
    Nov 14 '18 at 19:24






  • 2





    stackoverflow.com/questions/31708622/…

    – Flydog57
    Nov 14 '18 at 20:30














0












0








0








I am having the following problem. If I serialize Dates since 01-01-1970 and I deserialize them it works as expected. But for dates before 01-01-1970 the deserialization with momentjs doesn't work.



        DateTime dt = new DateTime(2010, 10, 20);
DateTimeOffset dt2 = new DateTimeOffset(dt).ToUniversalTime();
long a = dt2.ToUnixTimeMilliseconds();
Console.WriteLine("value1: " + a); //1287525600000 => moment(1287525600000).toDate() => Wednesday, 20. October 2010 (00:00:00)
DateTime dtfoo = new DateTime(1962, 10, 20);
DateTimeOffset dtfoo2 = new DateTimeOffset(dtfoo).ToUniversalTime();
long afoo = dtfoo2.ToUnixTimeMilliseconds();
Console.WriteLine("value2: " + afoo); // -227239200000 => moment(-227239200000).toDate() => Friday, 19. October 1962 (23:00:00 GMT+01:00)
Console.ReadLine();


I am deserializing the dates just with moment(unixtime).toDate(). The first date is 20-10-2010. The second date is 19-10-1962 (instead 20-10-1962).










share|improve this question














I am having the following problem. If I serialize Dates since 01-01-1970 and I deserialize them it works as expected. But for dates before 01-01-1970 the deserialization with momentjs doesn't work.



        DateTime dt = new DateTime(2010, 10, 20);
DateTimeOffset dt2 = new DateTimeOffset(dt).ToUniversalTime();
long a = dt2.ToUnixTimeMilliseconds();
Console.WriteLine("value1: " + a); //1287525600000 => moment(1287525600000).toDate() => Wednesday, 20. October 2010 (00:00:00)
DateTime dtfoo = new DateTime(1962, 10, 20);
DateTimeOffset dtfoo2 = new DateTimeOffset(dtfoo).ToUniversalTime();
long afoo = dtfoo2.ToUnixTimeMilliseconds();
Console.WriteLine("value2: " + afoo); // -227239200000 => moment(-227239200000).toDate() => Friday, 19. October 1962 (23:00:00 GMT+01:00)
Console.ReadLine();


I am deserializing the dates just with moment(unixtime).toDate(). The first date is 20-10-2010. The second date is 19-10-1962 (instead 20-10-1962).







c# datetime momentjs utc






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share|improve this question











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asked Nov 14 '18 at 19:01









user9923760user9923760

1079




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  • 2





    What do you expect? Unix time is the number of seconds since 1970-01-01 00:00:00 UTC. If you need to represent dates befor this, choose another representation.

    – Klaus Gütter
    Nov 14 '18 at 19:05











  • I am getting this value 19. October 1962 (23:00:00 GMT+01:00) for the date 20. October 1962. I think, I can represent dates before 1970 with Unix time but maybe I should serialize/deserialize the date in a different way.

    – user9923760
    Nov 14 '18 at 19:08











  • So you think the serializer is to blame?

    – None of the Above
    Nov 14 '18 at 19:19











  • I am asking if I can use unix time to represent dates before 1970.

    – user9923760
    Nov 14 '18 at 19:24






  • 2





    stackoverflow.com/questions/31708622/…

    – Flydog57
    Nov 14 '18 at 20:30














  • 2





    What do you expect? Unix time is the number of seconds since 1970-01-01 00:00:00 UTC. If you need to represent dates befor this, choose another representation.

    – Klaus Gütter
    Nov 14 '18 at 19:05











  • I am getting this value 19. October 1962 (23:00:00 GMT+01:00) for the date 20. October 1962. I think, I can represent dates before 1970 with Unix time but maybe I should serialize/deserialize the date in a different way.

    – user9923760
    Nov 14 '18 at 19:08











  • So you think the serializer is to blame?

    – None of the Above
    Nov 14 '18 at 19:19











  • I am asking if I can use unix time to represent dates before 1970.

    – user9923760
    Nov 14 '18 at 19:24






  • 2





    stackoverflow.com/questions/31708622/…

    – Flydog57
    Nov 14 '18 at 20:30








2




2





What do you expect? Unix time is the number of seconds since 1970-01-01 00:00:00 UTC. If you need to represent dates befor this, choose another representation.

– Klaus Gütter
Nov 14 '18 at 19:05





What do you expect? Unix time is the number of seconds since 1970-01-01 00:00:00 UTC. If you need to represent dates befor this, choose another representation.

– Klaus Gütter
Nov 14 '18 at 19:05













I am getting this value 19. October 1962 (23:00:00 GMT+01:00) for the date 20. October 1962. I think, I can represent dates before 1970 with Unix time but maybe I should serialize/deserialize the date in a different way.

– user9923760
Nov 14 '18 at 19:08





I am getting this value 19. October 1962 (23:00:00 GMT+01:00) for the date 20. October 1962. I think, I can represent dates before 1970 with Unix time but maybe I should serialize/deserialize the date in a different way.

– user9923760
Nov 14 '18 at 19:08













So you think the serializer is to blame?

– None of the Above
Nov 14 '18 at 19:19





So you think the serializer is to blame?

– None of the Above
Nov 14 '18 at 19:19













I am asking if I can use unix time to represent dates before 1970.

– user9923760
Nov 14 '18 at 19:24





I am asking if I can use unix time to represent dates before 1970.

– user9923760
Nov 14 '18 at 19:24




2




2





stackoverflow.com/questions/31708622/…

– Flydog57
Nov 14 '18 at 20:30





stackoverflow.com/questions/31708622/…

– Flydog57
Nov 14 '18 at 20:30












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