Julian dates and other stardates are cool because date arithmetic with the gregorian calendar is braindead. In most cases it would make sense to drop the time zone info if it is redundant, and use UTC otherwise.Īnother thing is that UTC should always be marked with 'Z', 'GMT' or 'UTC' to prevent guesswork and mistakes. Local time + time zone format "yyyy-MM-ddTHHmmsszz" is no longer sortable if multiple time zones are involved. You can also autodetect the DateTime.Kind with "K" and use "yyyy-MM-ddTHHmmssK", but then you'll have to replace the ':' characters. This field can be used for image captions in your gallery. At the bottom of the image window you will find the Comment input field. In these formats my current local time would be "T151800+03" and UTC "T121800Z" String result String.format( 'file-1tY-1tm-1td-1tk-1tS-1tp.txt', cal) // Display our result filename. You can view and edit the caption text if you right-click on an image and select Properties. Local time format string "yyyy-MM-ddTHHmmsszz".I have mostly ended up using ISO 8601 with basic time format: Practically, users seem to prefer local time to universal time. Other thing is that you should easily see if universal or local time is used. NET sortable date formats like "s" ( "yyyy-MM-ddTHH:mm:ss") and "u" ( "yyyy-MM-dd HH:mm:ssZ") are not valid in file names because of ':' characters. Objective issue is that timestamps in file names should be sortable. Represents a time (hour, minute, second and nanoseconds (HH-mm-ss-ns)) LocalDateTime. There seems to be no self-evident way to put a timestamp in a file name. Represents a date (year, month, day (yyyy-MM-dd)) LocalTime. If you don't prefer to use symbols you can try this also., string fileName 'fileName' + ('MMddyyyyhhmmsstt') + '.pdf' Hope this helps to someone now or in future. Change the file name to something like 'New File date time.txt' or 'New File year-month-day hour-minute-second.txt'. This is a somewhat subjective question, and not very important in the big scheme of things, but something that yet annoys me regularly. string fileName 'fileName' + ('MM-dd-yyyyhh-mm-ss-tt') + '.pdf' OR.
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