Offering the obligatory one-liner for this: 
perl -ane '$d=join q|/|,reverse(split q|/|, $F[8],3); print if $d ge q
+|2018/02/01| and $d le q|2018/02/06|' YOUR-FILE.TXT

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In reply to Re: extract lines from file between date range. by NetWallah
in thread extract lines from file between date range. by rinkish85

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