/server/rest/services/Hosted/test/FeatureServer/0/query) and query the service to see the fields and their values. Here the date and time are shown in an epoch time format. The user needs to use an epoch converter to convert it into to GMT time. Refer to https://www.epochconverter.com/ for more information.
The CSV time values correct to the user. The Date field was not recognized by the server because it is an unsupported format. The field type is identified as a string and the values are retained. The user thought this is the expected behavior.
Check the field type in the server rest page of the service. This is actually a limitation for CSV format, the date fields are only identified when it is in a certain format, any other format of the date, for example, if it is danish style local format, it is taken as a string field and no conversion is applied while publishing.
Documentation for reference: https://enterprise.arcgis.com/en/portal/latest/use/csv-gpx.htm#DATE
対処法
It works without any issue if the file is converted to CSV instead. Refer to the CSV file, 'testing'.
再現の手順