diff --git a/custom_components/pyscript/trigger.py b/custom_components/pyscript/trigger.py
index f0372a7..15a524b 100644
--- a/custom_components/pyscript/trigger.py
+++ b/custom_components/pyscript/trigger.py
@@ -717,11 +717,12 @@ def timer_trigger_next(cls, time_spec, now, startup_time):
 
             elif len(match1) == 3:
                 this_t = cls.parse_date_time(match1[1].strip(), 0, now, startup_time)
-                if this_t <= now and this_t != startup_time:
+                day_offset = (now - this_t).days + 1
+                if day_offset != 0 and this_t != startup_time:
                     #
-                    # Try tomorrow (won't make a difference if spec has full date)
+                    # Try a day offset (won't make a difference if spec has full date)
                     #
-                    this_t = cls.parse_date_time(match1[1].strip(), 1, now, startup_time)
+                    this_t = cls.parse_date_time(match1[1].strip(), day_offset, now, startup_time)
                 startup = now == this_t and now == startup_time
                 if (now < this_t or startup) and (next_time is None or this_t < next_time):
                     next_time = this_t
diff --git a/tests/test_unit_trigger.py b/tests/test_unit_trigger.py
index 1e68cb9..4550fd8 100644
--- a/tests/test_unit_trigger.py
+++ b/tests/test_unit_trigger.py
@@ -209,6 +209,10 @@ def test_timer_active_check(hass, spec, now, expected):
     [["once(2019/9/1 8:00)"], [None]],
     [["once(2019/9/1 15:00)"], [dt(2019, 9, 1, 15, 0, 0, 0)]],
     [["once(15:00)"], [dt(2019, 9, 1, 15, 0, 0, 0)]],
+    [["once(15:00 + 2d)"], [dt(2019, 9, 1, 15, 0, 0, 0), dt(2019, 9, 2, 15, 0, 0, 0)]],
+    [["once(15:00 - 48h)"], [dt(2019, 9, 1, 15, 0, 0, 0), dt(2019, 9, 2, 15, 0, 0, 0)]],
+    [["once(11:00 + 2d)"], [dt(2019, 9, 2, 11, 0, 0, 0), dt(2019, 9, 3, 11, 0, 0, 0)]],
+    [["once(11:00 - 48h)"], [dt(2019, 9, 2, 11, 0, 0, 0), dt(2019, 9, 3, 11, 0, 0, 0)]],
     [["once(13:00:0.09)"], [dt(2019, 9, 2, 13, 0, 0, 90000)]],
     [["once(9:00)"], [dt(2019, 9, 2, 9, 0, 0, 0)]],
     [["once(wed 9:00)"], [dt(2019, 9, 4, 9, 0, 0, 0)]],