diff --git a/hledger-lib/Hledger/Data/Dates.hs b/hledger-lib/Hledger/Data/Dates.hs
index 2c07a9ab0..fee3c43b6 100644
--- a/hledger-lib/Hledger/Data/Dates.hs
+++ b/hledger-lib/Hledger/Data/Dates.hs
@@ -984,6 +984,8 @@ reportingintervalp = choice' [
                        tryinterval "year"    "yearly"    Years,
                        do string' "biweekly"
                           return $ Weeks 2,
+                       do string' "fortnightly"
+                          return $ Weeks 2,
                        do string' "bimonthly"
                           return $ Months 2,
                        do string' "every"
diff --git a/hledger/hledger.1 b/hledger/hledger.1
index 248a646ea..bba249092 100644
--- a/hledger/hledger.1
+++ b/hledger/hledger.1
@@ -1521,7 +1521,7 @@ T}
 .TE
 .PP
 The following more complex report intervals are also supported:
-\f[C]biweekly\f[R], \f[C]bimonthly\f[R],
+\f[C]biweekly\f[R], \f[C]fortnightly\f[R], \f[C]bimonthly\f[R],
 \f[C]every day|week|month|quarter|year\f[R],
 \f[C]every N days|weeks|months|quarters|years\f[R].
 .PP
diff --git a/hledger/hledger.m4.md b/hledger/hledger.m4.md
index 567bbe9f4..9831189eb 100644
--- a/hledger/hledger.m4.md
+++ b/hledger/hledger.m4.md
@@ -1029,6 +1029,7 @@ For example:
 
 The following more complex report intervals are also supported:
 `biweekly`,
+`fortnightly`,
 `bimonthly`,
 `every day|week|month|quarter|year`,
 `every N days|weeks|months|quarters|years`.