diff --git a/frontend/src/ui/common.rs b/frontend/src/ui/common.rs
index c089c5d..fd165ef 100644
--- a/frontend/src/ui/common.rs
+++ b/frontend/src/ui/common.rs
@@ -649,8 +649,7 @@ pub fn view_chart<Ms>(
 
 pub fn plot_line_chart(
     data: &[(Vec<(NaiveDate, f32)>, usize)],
-    x_min: NaiveDate,
-    x_max: NaiveDate,
+    interval: &Interval,
     y_min_opt: Option<f32>,
     y_max_opt: Option<f32>,
     theme: &data::Theme,
@@ -682,7 +681,7 @@ pub fn plot_line_chart(
             .y_label_area_size(40f32);
 
         let mut chart = chart_builder.build_cartesian_2d(
-            x_min..x_max,
+            interval.first..interval.last,
             f32::max(0., y_min - y_margin)..y_max + y_margin,
         )?;
 
@@ -724,8 +723,7 @@ pub fn plot_line_chart(
 pub fn plot_dual_line_chart(
     data: &[(Vec<(NaiveDate, f32)>, usize)],
     secondary_data: &[(Vec<(NaiveDate, f32)>, usize)],
-    x_min: NaiveDate,
-    x_max: NaiveDate,
+    interval: &Interval,
     theme: &data::Theme,
 ) -> Result<Option<String>, Box<dyn std::error::Error>> {
     if all_zeros(data) && all_zeros(secondary_data) {
@@ -761,8 +759,14 @@ pub fn plot_dual_line_chart(
             .x_label_area_size(30f32)
             .y_label_area_size(40f32)
             .right_y_label_area_size(40f32)
-            .build_cartesian_2d(x_min..x_max, y1_min - y1_margin..y1_max + y1_margin)?
-            .set_secondary_coord(x_min..x_max, y2_min - y2_margin..y2_max + y2_margin);
+            .build_cartesian_2d(
+                interval.first..interval.last,
+                y1_min - y1_margin..y1_max + y1_margin,
+            )?
+            .set_secondary_coord(
+                interval.first..interval.last,
+                y2_min - y2_margin..y2_max + y2_margin,
+            );
 
         chart
             .configure_mesh()
@@ -826,8 +830,7 @@ pub fn plot_dual_line_chart(
 pub fn plot_bar_chart(
     data: &[(Vec<(NaiveDate, f32)>, usize)],
     secondary_data: &[(Vec<(NaiveDate, f32)>, usize)],
-    x_min: NaiveDate,
-    x_max: NaiveDate,
+    interval: &Interval,
     y_min_opt: Option<f32>,
     y_max_opt: Option<f32>,
     single_y_domain: bool,
@@ -874,10 +877,13 @@ pub fn plot_bar_chart(
             .y_label_area_size(40f32)
             .right_y_label_area_size(30f32)
             .build_cartesian_2d(
-                (x_min..x_max).into_segmented(),
+                (interval.first..interval.last).into_segmented(),
                 y1_min - y1_margin..y1_max + y1_margin,
             )?
-            .set_secondary_coord(x_min..x_max, y2_min - y2_margin..y2_max + y2_margin);
+            .set_secondary_coord(
+                interval.first..interval.last,
+                y2_min - y2_margin..y2_max + y2_margin,
+            );
 
         chart
             .configure_mesh()
diff --git a/frontend/src/ui/page/body_fat.rs b/frontend/src/ui/page/body_fat.rs
index 5df8bdb..a71f8f8 100644
--- a/frontend/src/ui/page/body_fat.rs
+++ b/frontend/src/ui/page/body_fat.rs
@@ -766,8 +766,7 @@ fn view_chart(model: &Model, data_model: &data::Model) -> Node<Msg> {
                     .collect::<Vec<_>>(),
                 common::COLOR_BODY_WEIGHT,
             )],
-            model.interval.first,
-            model.interval.last,
+            &model.interval,
             data_model.theme(),
         ),
         true,
diff --git a/frontend/src/ui/page/body_weight.rs b/frontend/src/ui/page/body_weight.rs
index a043f73..44c9d65 100644
--- a/frontend/src/ui/page/body_weight.rs
+++ b/frontend/src/ui/page/body_weight.rs
@@ -386,8 +386,7 @@ fn view_chart(model: &Model, data_model: &data::Model) -> Node<Msg> {
                     common::COLOR_AVG_BODY_WEIGHT,
                 ),
             ],
-            model.interval.first,
-            model.interval.last,
+            &model.interval,
             None,
             None,
             data_model.theme(),
diff --git a/frontend/src/ui/page/exercise.rs b/frontend/src/ui/page/exercise.rs
index 930d6a5..037a57f 100644
--- a/frontend/src/ui/page/exercise.rs
+++ b/frontend/src/ui/page/exercise.rs
@@ -572,8 +572,7 @@ pub fn view_charts<Ms>(
                 &[("Time under tension (s)", common::COLOR_TUT)],
                 common::plot_line_chart(
                     &[(tut.into_iter().collect::<Vec<_>>(), common::COLOR_TUT,)],
-                    interval.first,
-                    interval.last,
+                    interval,
                     Some(0.),
                     Some(10.),
                     theme,
@@ -585,8 +584,7 @@ pub fn view_charts<Ms>(
             &labels,
             common::plot_line_chart(
                 &data,
-                interval.first,
-                interval.last,
+                interval,
                 Some(0.),
                 Some(10.),
                 theme,
@@ -606,8 +604,7 @@ pub fn view_charts<Ms>(
                         .collect::<Vec<_>>(),
                     common::COLOR_WEIGHT,
                 )],
-                interval.first,
-                interval.last,
+                interval,
                 Some(0.),
                 Some(10.),
                 theme,
@@ -627,8 +624,7 @@ pub fn view_charts<Ms>(
                             .collect::<Vec<_>>(),
                         common::COLOR_TIME,
                     )],
-                    interval.first,
-                    interval.last,
+                    interval,
                     Some(0.),
                     Some(10.),
                     theme,
diff --git a/frontend/src/ui/page/menstrual_cycle.rs b/frontend/src/ui/page/menstrual_cycle.rs
index f6bd8bb..87af870 100644
--- a/frontend/src/ui/page/menstrual_cycle.rs
+++ b/frontend/src/ui/page/menstrual_cycle.rs
@@ -354,8 +354,7 @@ fn view_chart(model: &Model, data_model: &data::Model) -> Node<Msg> {
                 common::COLOR_PERIOD_INTENSITY,
             )],
             &[],
-            model.interval.first,
-            model.interval.last,
+            &model.interval,
             Some(0.),
             Some(4.),
             false,
diff --git a/frontend/src/ui/page/routine.rs b/frontend/src/ui/page/routine.rs
index c9b17a9..6be52e6 100644
--- a/frontend/src/ui/page/routine.rs
+++ b/frontend/src/ui/page/routine.rs
@@ -1340,8 +1340,7 @@ pub fn view_charts<Ms>(
             &[("Load", common::COLOR_LOAD)],
             common::plot_line_chart(
                 &[(load.into_iter().collect::<Vec<_>>(), common::COLOR_LOAD)],
-                interval.first,
-                interval.last,
+                interval,
                 Some(0.),
                 Some(10.),
                 theme,
diff --git a/frontend/src/ui/page/training.rs b/frontend/src/ui/page/training.rs
index 0e1c131..a4e9627 100644
--- a/frontend/src/ui/page/training.rs
+++ b/frontend/src/ui/page/training.rs
@@ -535,8 +535,7 @@ pub fn view_charts<Ms>(
                     (long_term_load, common::COLOR_LONG_TERM_LOAD),
                     (short_term_load, common::COLOR_LOAD)
                 ],
-                interval.first,
-                interval.last,
+                interval,
                 Some(0.),
                 Some(10.),
                 theme,