This blog is updated daily.
A general description is here.
There is experimental support to use the shipped Olson time-zone database and (64-bit) time-zone conversion code: use ‘configure’ option ‘--with-internal-tzcode’. (It might be necessary to set environment variable ‘TZ’ on OSes where this is not already set.)
The version of ‘tzcode’ included in ‘src/extra/tzone’ has been updated. (Formerly used only on Windows.)
The code for date-times before 1902 assumed that the offset from GMT in 1902 was a whole number of minutes: that was not true of Paris.