Chris Muller uploaded a new version of Kernel to project The Trunk:
http://source.squeak.org/trunk/Kernel-cmm.757.mcz

==================== Summary ====================

Name: Kernel-cmm.757
Author: cmm
Time: 3 May 2013, 11:37:02.186 am
UUID: 655c18f5-1a73-4fae-bd0d-0e2bb4bb06d7
Ancestors: Kernel-dtl.756

- Added convenience methods for creating DateAndTimes relative to now.
- When materializing Floats via fromIEEE32Bit:, use the canonicalized 0.0.

=============== Diff against Kernel-dtl.756 ===============

Item was added:
+ ----- Method: Duration>>ago (in category 'squeak protocol') -----
+ ago
+ 	"Answer the DateAndTime which was the receiver's duration ago.
+ 	e.g., 5 minutes ago.  2 days ago."
+ 	^ DateAndTime now - self!

Item was added:
+ ----- Method: Duration>>fromNow (in category 'squeak protocol') -----
+ fromNow
+ 	"Answer the DateAndTime which which occurs the receiver's duration from now.
+ 	e.g., 5 minutes fromNow.  2 days fromNow."
+ 	^ DateAndTime now + self!