DateTimeRenderOption

Instructs date, time, datetime, and duration fields to be output as doubles in "serial number" format, as popularized by Lotus 1-2-3. The whole number portion of the value (counting the epoch of 1900-01-01 as 1) is the number of days since 1900-01-01. The fractional portion of the value counts the time as a fraction of the day.

Instructs date, time, datetime, and duration fields to be output as strings in their given number format (which depends on the spreadsheet locale).