View source for Format date and time as you like most

'''Problem'''. How do I make a string containing the current date and time with a format I like ?

'''Solution'''. Just follow this example. I use <code>Printf</code> package here because it lets me state I want in output an integer printed with 2 digits padding it with zeroes if necessary.
 Feature require: 'Printf'
 
 # make a DataAndTime object with the current date and time, then we print it the way we want
 d0 _ DateAndTime now. 
 
 # a very much standard date printing for e.g. a log file 
 'myFile-%d-%02d-%02d-%02d-%02d.log' printf: {
                   d0 yearNumber.  d0 monthIndex.   d0 dayOfMonth. d0 hour24. d0 minute }
 " 'myFile-2021-09-06-10-04.log' "
 
 # a more personal date format, fit for human eyes
 '%s-%02d-%s-%d-%02d:%02d' printf: {
                   d0 dayOfWeekAbbreviation. d0 dayOfMonth.  d0 monthAbbreviation .   
                   d0 yearNumber . d0 hour24. d0 minute }
 "=>  'Mon-06-Sep-2021-10:04' "
'''Exercise'''. In the second example put the full month name, use the Browser to discover the proper message name.

'''Exercise'''. Get in output the current time in 12h format, that e.g. '10:00 AM'.

'''Exercise'''. Try to use <code>String>>format:</code> instead of <code>String:printf:</code> and see what happens.