[date-time] USE_DATE_TIME_PRE_1_33_FACET_IO to be removed in next release

From: Jeff Garland (azswdude_at_[hidden])
Date: 2020-03-06 11:12:15

 //crosspost from users list

In case you've not checked the calendar (see below) it's 2020 and a the c++
world has moved on from the issue this macro solved. boost date-time also
needs to move forward into the decade with a modernized all header code
base . If you're dependent on this macro for any reason I'd like to hear
about it.

Thanks,

Jeff
using namespace boost::gregorian;
date today = day_clock::local_day();
cout << today.year() << endl; //2020 ;)