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				@@ -45,6 +45,10 @@ borg prune 
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				     +-----------------------------------------------------------------------------+----------------------------------------------+---------------------------------------------------------------------------------------------------+ 
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				     |                                                                             | ``-m``, ``--keep-monthly``                   | number of monthly archives to keep                                                                | 
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				     +-----------------------------------------------------------------------------+----------------------------------------------+---------------------------------------------------------------------------------------------------+ 
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				+    |                                                                             | ``--keep-13weekly``                          | number of quarterly archives to keep (13 week strategy)                                           | 
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				+    +-----------------------------------------------------------------------------+----------------------------------------------+---------------------------------------------------------------------------------------------------+ 
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				+    |                                                                             | ``--keep-3monthly``                          | number of quarterly archives to keep (3 month strategy)                                           | 
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				+    +-----------------------------------------------------------------------------+----------------------------------------------+---------------------------------------------------------------------------------------------------+ 
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				     |                                                                             | ``-y``, ``--keep-yearly``                    | number of yearly archives to keep                                                                 | 
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				     +-----------------------------------------------------------------------------+----------------------------------------------+---------------------------------------------------------------------------------------------------+ 
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				     | .. class:: borg-common-opt-ref                                                                                                                                                                                                 | 
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				@@ -92,6 +96,8 @@ borg prune 
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				         -d, --keep-daily      number of daily archives to keep 
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				         -w, --keep-weekly     number of weekly archives to keep 
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				         -m, --keep-monthly    number of monthly archives to keep 
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				+        --keep-13weekly       number of quarterly archives to keep (13 week strategy) 
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				+        --keep-3monthly       number of quarterly archives to keep (3 month strategy) 
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				         -y, --keep-yearly     number of yearly archives to keep 
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				@@ -146,10 +152,15 @@ rules do not count towards those of later rules. The time that each backup 
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				 starts is used for pruning purposes. Dates and times are interpreted in the local 
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				 timezone of the system where borg prune runs, and weeks go from Monday to Sunday. 
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				 Specifying a negative number of archives to keep means that there is no limit. 
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				-As of borg 1.2.0, borg will retain the oldest archive if any of the secondly, 
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				-minutely, hourly, daily, weekly, monthly, or yearly rules was not otherwise able to 
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				-meet its retention target. This enables the first chronological archive to continue 
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				-aging until it is replaced by a newer archive that meets the retention criteria. 
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				+ 
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				+Borg will retain the oldest archive if any of the secondly, minutely, hourly, 
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				+daily, weekly, monthly, quarterly, or yearly rules was not otherwise able to 
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				+meet its retention target. This enables the first chronological archive to 
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				+continue aging until it is replaced by a newer archive that meets the retention 
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				+criteria. 
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				+ 
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				+The ``--keep-13weekly`` and ``--keep-3monthly`` rules are two different 
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				+strategies for keeping archives every quarter year. 
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				 The ``--keep-last N`` option is doing the same as ``--keep-secondly N`` (and it will 
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				 keep the last N archives under the assumption that you do not create more than one 
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