Date/Time Conversion from YYYY-MM-DDTHH:MM:SS

To do this, you can use the apex DateTime class:

// replace the 'T' with blank space to make date time string compatible with format method String dtString = '2020-10-01T15:22:20'.replace('T', ' '); // Convert the string to DateTime DateTime dt = DateTime.valueOfGMT(dtString); // Now use formatGMT method with appropriate dateFormatString to convert DateTime to string String dtNewString = dt.formatGMT('MM-dd-yy HH:mm'); System.debug(dtNewString);

In the console, this outputs as:

DEBUG|10-01-20 15:22