diff --git a/src/humanize/time.py b/src/humanize/time.py
index 4a07d52..4b8bd9c 100644
--- a/src/humanize/time.py
+++ b/src/humanize/time.py
@@ -245,6 +245,17 @@ def naturaldelta(
 
         return _ngettext("1 year, %d day", "1 year, %d days", days) % days
 
+    if use_months and 0 < num_months < 12:
+        years_str = _ngettext("%d year", "%d years", years).replace(
+            "%d", "%s"
+        ) % intcomma(years)
+        months_str = _ngettext("%d month", "%d months", num_months) % num_months
+        return f"{years_str}, {months_str}"
+    if use_months and num_months == 12:
+        years += 1
+        return _ngettext("%d year", "%d years", years).replace("%d", "%s") % intcomma(
+            years
+        )
     return _ngettext("%d year", "%d years", years).replace("%d", "%s") % intcomma(years)
 
 
diff --git a/tests/test_time.py b/tests/test_time.py
index 7699770..f5a1695 100644
--- a/tests/test_time.py
+++ b/tests/test_time.py
@@ -112,15 +112,15 @@ def test_naturaldelta_nomonths(test_input: dt.timedelta, expected: str) -> None:
         (dt.timedelta(hours=23, minutes=50, seconds=50), "a day"),
         (dt.timedelta(days=1), "a day"),
         (dt.timedelta(days=500), "1 year, 4 months"),
-        (dt.timedelta(days=365 * 2 + 35), "2 years"),
+        (dt.timedelta(days=365 * 2 + 35), "2 years, 1 month"),
         (dt.timedelta(seconds=1), "a second"),
         (dt.timedelta(seconds=30), "30 seconds"),
         (dt.timedelta(days=364), "a year"),
         (dt.timedelta(days=365 + 364), "2 years"),
         # regression tests for bugs in post-release humanize
-        (dt.timedelta(days=10000), "27 years"),
+        (dt.timedelta(days=10000), "27 years, 5 months"),
         (dt.timedelta(days=365 + 35), "1 year, 1 month"),
-        (dt.timedelta(days=365 * 2 + 65), "2 years"),
+        (dt.timedelta(days=365 * 2 + 65), "2 years, 2 months"),
         (dt.timedelta(days=365 + 4), "1 year, 4 days"),
         (dt.timedelta(days=35), "a month"),
         (dt.timedelta(days=65), "2 months"),
@@ -154,7 +154,7 @@ def test_naturaldelta(test_input: float | dt.timedelta, expected: str) -> None:
         (NOW - dt.timedelta(hours=23, minutes=50, seconds=50), "a day ago"),
         (NOW - dt.timedelta(days=1), "a day ago"),
         (NOW - dt.timedelta(days=500), "1 year, 4 months ago"),
-        (NOW - dt.timedelta(days=365 * 2 + 35), "2 years ago"),
+        (NOW - dt.timedelta(days=365 * 2 + 35), "2 years, 1 month ago"),
         (NOW + dt.timedelta(seconds=1), "a second from now"),
         (NOW + dt.timedelta(seconds=30), "30 seconds from now"),
         (NOW + dt.timedelta(minutes=1, seconds=29), "a minute from now"),
@@ -166,17 +166,17 @@ def test_naturaldelta(test_input: float | dt.timedelta, expected: str) -> None:
         (NOW + dt.timedelta(hours=23, minutes=50, seconds=50), "a day from now"),
         (NOW + dt.timedelta(days=1), "a day from now"),
         (NOW + dt.timedelta(days=500), "1 year, 4 months from now"),
-        (NOW + dt.timedelta(days=365 * 2 + 35), "2 years from now"),
+        (NOW + dt.timedelta(days=365 * 2 + 35), "2 years, 1 month from now"),
         # regression tests for bugs in post-release humanize
-        (NOW + dt.timedelta(days=10000), "27 years from now"),
+        (NOW + dt.timedelta(days=10000), "27 years, 5 months from now"),
         (NOW - dt.timedelta(days=365 + 35), "1 year, 1 month ago"),
-        (dt.timedelta(days=-10000), "27 years from now"),
+        (dt.timedelta(days=-10000), "27 years, 5 months from now"),
         (dt.timedelta(days=365 + 35), "1 year, 1 month ago"),
         (22.5, "22 seconds ago"),
         (23.5, "24 seconds ago"),
         (23.9, "24 seconds ago"),
         (30, "30 seconds ago"),
-        (NOW - dt.timedelta(days=365 * 2 + 65), "2 years ago"),
+        (NOW - dt.timedelta(days=365 * 2 + 65), "2 years, 2 months ago"),
         (NOW - dt.timedelta(days=365 + 4), "1 year, 4 days ago"),
         ("NaN", "NaN"),
     ],
@@ -479,7 +479,7 @@ def test_naturaltime_minimum_unit_explicit(
         (NOW_UTC - dt.timedelta(hours=23, minutes=50, seconds=50), "a day ago"),
         (NOW_UTC - dt.timedelta(days=1), "a day ago"),
         (NOW_UTC - dt.timedelta(days=500), "1 year, 4 months ago"),
-        (NOW_UTC - dt.timedelta(days=365 * 2 + 35), "2 years ago"),
+        (NOW_UTC - dt.timedelta(days=365 * 2 + 35), "2 years, 1 month ago"),
         (NOW_UTC + dt.timedelta(seconds=1), "a second from now"),
         (NOW_UTC + dt.timedelta(seconds=30), "30 seconds from now"),
         (NOW_UTC + dt.timedelta(minutes=1, seconds=29), "a minute from now"),
@@ -491,11 +491,11 @@ def test_naturaltime_minimum_unit_explicit(
         (NOW_UTC + dt.timedelta(hours=23, minutes=50, seconds=50), "a day from now"),
         (NOW_UTC + dt.timedelta(days=1), "a day from now"),
         (NOW_UTC + dt.timedelta(days=500), "1 year, 4 months from now"),
-        (NOW_UTC + dt.timedelta(days=365 * 2 + 35), "2 years from now"),
+        (NOW_UTC + dt.timedelta(days=365 * 2 + 35), "2 years, 1 month from now"),
         # regression tests for bugs in post-release humanize
-        (NOW_UTC + dt.timedelta(days=10000), "27 years from now"),
+        (NOW_UTC + dt.timedelta(days=10000), "27 years, 5 months from now"),
         (NOW_UTC - dt.timedelta(days=365 + 35), "1 year, 1 month ago"),
-        (NOW_UTC - dt.timedelta(days=365 * 2 + 65), "2 years ago"),
+        (NOW_UTC - dt.timedelta(days=365 * 2 + 65), "2 years, 2 months ago"),
         (NOW_UTC - dt.timedelta(days=365 + 4), "1 year, 4 days ago"),
     ],
 )
@@ -519,7 +519,7 @@ def test_naturaltime_timezone(test_input: dt.datetime, expected: str) -> None:
         (NOW_UTC - dt.timedelta(hours=23, minutes=50, seconds=50), "a day ago"),
         (NOW_UTC - dt.timedelta(days=1), "a day ago"),
         (NOW_UTC - dt.timedelta(days=500), "1 year, 4 months ago"),
-        (NOW_UTC - dt.timedelta(days=365 * 2 + 35), "2 years ago"),
+        (NOW_UTC - dt.timedelta(days=365 * 2 + 35), "2 years, 1 month ago"),
         (NOW_UTC + dt.timedelta(seconds=1), "a second from now"),
         (NOW_UTC + dt.timedelta(seconds=30), "30 seconds from now"),
         (NOW_UTC + dt.timedelta(minutes=1, seconds=29), "a minute from now"),
@@ -531,11 +531,11 @@ def test_naturaltime_timezone(test_input: dt.datetime, expected: str) -> None:
         (NOW_UTC + dt.timedelta(hours=23, minutes=50, seconds=50), "a day from now"),
         (NOW_UTC + dt.timedelta(days=1), "a day from now"),
         (NOW_UTC + dt.timedelta(days=500), "1 year, 4 months from now"),
-        (NOW_UTC + dt.timedelta(days=365 * 2 + 35), "2 years from now"),
+        (NOW_UTC + dt.timedelta(days=365 * 2 + 35), "2 years, 1 month from now"),
         # regression tests for bugs in post-release humanize
-        (NOW_UTC + dt.timedelta(days=10000), "27 years from now"),
+        (NOW_UTC + dt.timedelta(days=10000), "27 years, 5 months from now"),
         (NOW_UTC - dt.timedelta(days=365 + 35), "1 year, 1 month ago"),
-        (NOW_UTC - dt.timedelta(days=365 * 2 + 65), "2 years ago"),
+        (NOW_UTC - dt.timedelta(days=365 * 2 + 65), "2 years, 2 months ago"),
         (NOW_UTC - dt.timedelta(days=365 + 4), "1 year, 4 days ago"),
     ],
 )