[http://sf.net/projects/tcl/files/Tcl/8.6.11/tcltk-release-notes-8.6.11.txt/view%|%Released]
December 31, 2020.

**Tcl Changes**

***Changes to Tcl Commands***
****New Subcommands****

   * [interp children] [[[http://tip.tcl.tk/581%|%TIP #581]]]

***Changed Tcl behavior***

   * Revised [binary encode] [base64], [binary decode] [base64] for roundtrip safety and RFC 2045 compliance.
   * [clock scan] adds support for CCyy-mm-ddThh:mm:ss

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**Tk Changes**

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**Changes to Bundled Packages**
***Updated packages***
   * [Itcl] 4.2.1
   * [sqlite3] 3.34.0
   * [tdbc] 1.1.2
   * [tdbc::mysql] 1.1.2
   * [tdbc::odbc] 1.1.2
   * [tdbc::postgres] 1.1.2
   * [tdbc::sqlite3] 1.1.2
   * [Thread] 2.8.6
   * [dde] 1.4.3
   * [registry] 1.3.5
   * [http] 2.9.5
   * [tcltest] 2.5.3
   * [platform] 1.0.15

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See also:
   * [Highlights of Tcl 8.6]
   * [Highlights of Tk 8.6]
   * [The major new features of Tcl/Tk 8.6]
   * [Changes to consider when moving to Tcl 8.6]

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