diff --git a/src/utilities/convert/string2date.m b/src/utilities/convert/string2date.m
index 81172b9d09fb7e057f44f5eecf1a448caa83d872..96835ea6df0f708409f2b3029429b82db2a36ac0 100644
--- a/src/utilities/convert/string2date.m
+++ b/src/utilities/convert/string2date.m
@@ -30,7 +30,7 @@ if isyearly(a)
     return
 end
 
-if isquaterly(a)
+if isquarterly(a)
     year = 1:(regexp(a,'[Qq]')-1);
     date.freq = 4;
     date.time = write_time_field(a, year);
diff --git a/src/utilities/is/isquaterly.m b/src/utilities/is/isquarterly.m
similarity index 70%
rename from src/utilities/is/isquaterly.m
rename to src/utilities/is/isquarterly.m
index 2c421cb118aba8307c1d123a57755ada72be634f..1a0a8b3a1c0a723f99bf537722ea83ffda9f95e5 100644
--- a/src/utilities/is/isquaterly.m
+++ b/src/utilities/is/isquarterly.m
@@ -1,12 +1,12 @@
-function b = isquaterly(str)  % --*-- Unitary tests --*--
+function b = isquarterly(str)  % --*-- Unitary tests --*--
 
-% Tests if the input can be interpreted as a quaterly date.
+% Tests if the input can be interpreted as a quarterly date.
 %
 % INPUTS
 %  o str     string.
 %
 % OUTPUTS
-%  o b       integer scalar, equal to 1 if str can be interpreted as a quaterly date or 0 otherwise.
+%  o b       integer scalar, equal to 1 if str can be interpreted as a quarterly date or 0 otherwise.
 
 % Copyright (C) 2012-2017 Dynare Team
 %
@@ -45,12 +45,12 @@ end
 %$ date_6 = '1950Y';
 %$ date_7 = '1950m24';
 %$
-%$ t(1) = dassert(isquaterly(date_1),true);
-%$ t(2) = dassert(isquaterly(date_2),true);
-%$ t(3) = dassert(isquaterly(date_3),true);
-%$ t(4) = dassert(isquaterly(date_4),false);
-%$ t(5) = dassert(isquaterly(date_5),false);
-%$ t(6) = dassert(isquaterly(date_6),false);
-%$ t(7) = dassert(isquaterly(date_7),false);
+%$ t(1) = dassert(isquarterly(date_1),true);
+%$ t(2) = dassert(isquarterly(date_2),true);
+%$ t(3) = dassert(isquarterly(date_3),true);
+%$ t(4) = dassert(isquarterly(date_4),false);
+%$ t(5) = dassert(isquarterly(date_5),false);
+%$ t(6) = dassert(isquarterly(date_6),false);
+%$ t(7) = dassert(isquarterly(date_7),false);
 %$ T = all(t);
 %@eof:1
\ No newline at end of file
diff --git a/src/utilities/is/isstringdate.m b/src/utilities/is/isstringdate.m
index 3f1b84a40feab7d872265884db23194cdfc01f22..ffbcefc87263c71b55c463f7648d82c0cd415eec 100644
--- a/src/utilities/is/isstringdate.m
+++ b/src/utilities/is/isstringdate.m
@@ -26,7 +26,7 @@ function b = isstringdate(str)  % --*-- Unitary tests --*--
 % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
 
 if ischar(str)
-    b = isquaterly(str) || isyearly(str) || ismonthly(str) || isweekly(str);
+    b = isquarterly(str) || isyearly(str) || ismonthly(str) || isweekly(str);
 else
     b = false;
 end