diff --git a/frontend/src/metabase/components/Calendar.css b/frontend/src/metabase/components/Calendar.css
index d817c2033b3e83837a1994eb7fe49f492d62c6e8..34eba1633882ca3e9278cd5080d73736f8b182ca 100644
--- a/frontend/src/metabase/components/Calendar.css
+++ b/frontend/src/metabase/components/Calendar.css
@@ -1,5 +1,24 @@
+.Calendar-weeks {
+  padding-bottom: 14px;
+}
+
 .Calendar-week {
   display: flex;
+  padding-left: 12px;
+  padding-right: 12px;
+}
+
+.Calendar-header {
+  padding: 14px;
+  margin-bottom: 8px;
+}
+
+.Calendar-header h4 {
+  font-weight: 700;
+}
+
+.Calendar-day-names {
+  opacity: 0.12;
 }
 
 .Calendar-day,
@@ -12,7 +31,9 @@
   position: relative;
   border-radius: 99px;
   font-weight: 700;
+  font-size: 12px;
   background-color: transparent;
+  padding: 10px;
 }
 
 .Calendar-day:hover {
diff --git a/frontend/src/metabase/components/Calendar.jsx b/frontend/src/metabase/components/Calendar.jsx
index 8886f8a3c6eee33c3c82333d2ebedb52d628caba..d49464879cd4953657f113a95eb5becb0503d9f8 100644
--- a/frontend/src/metabase/components/Calendar.jsx
+++ b/frontend/src/metabase/components/Calendar.jsx
@@ -87,25 +87,20 @@ export default class Calendar extends Component {
 
   renderMonthHeader(current, side) {
     return (
-      <div className="Calendar-header flex align-center">
+      <div className="Calendar-header flex align-center border-bottom">
         {side !== "right" && (
           <div
-            className="bordered rounded p1 cursor-pointer transition-border border-hover px1"
+            className="cursor-pointer text-brand-hover"
             onClick={this.previous}
           >
             <Icon name="chevronleft" size={10} />
           </div>
         )}
         <span className="flex-full" />
-        <h4 className="cursor-pointer rounded p1">
-          {current.format("MMMM YYYY")}
-        </h4>
+        <h4>{current.format("MMMM YYYY")}</h4>
         <span className="flex-full" />
         {side !== "left" && (
-          <div
-            className="bordered border-hover rounded p1 transition-border cursor-pointer px1"
-            onClick={this.next}
-          >
+          <div className="cursor-pointer text-brand-hover" onClick={this.next}>
             <Icon name="chevronright" size={10} />
           </div>
         )}
@@ -157,7 +152,7 @@ export default class Calendar extends Component {
   renderCalender(current, side) {
     return (
       <div
-        className={cx("Calendar Grid-cell", {
+        className={cx("Calendar", {
           "Calendar--range":
             this.props.isRangePicker &&
             this.props.selected &&
@@ -189,7 +184,7 @@ class Week extends Component {
     let { date, month, selected, selectedEnd } = this.props;
 
     for (let i = 0; i < 7; i++) {
-      const classes = cx("Calendar-day p1 cursor-pointer text-centered", {
+      const classes = cx("Calendar-day cursor-pointer text-centered", {
         "Calendar-day--today": date.isSame(new Date(), "day"),
         "Calendar-day--this-month": date.month() === month.month(),
         "Calendar-day--selected": selected && date.isSame(selected, "day"),
diff --git a/frontend/src/metabase/parameters/components/widgets/DateRangeWidget.jsx b/frontend/src/metabase/parameters/components/widgets/DateRangeWidget.jsx
index 01d2674fc55144dbb059acb713be0f8bd7178894..df5a247e1331e794e660e2ddf3bbf8ff7a77a809 100644
--- a/frontend/src/metabase/parameters/components/widgets/DateRangeWidget.jsx
+++ b/frontend/src/metabase/parameters/components/widgets/DateRangeWidget.jsx
@@ -44,20 +44,18 @@ export default class DateRangeWidget extends Component {
   render() {
     const { start, end } = this.state;
     return (
-      <div className="p1">
-        <Calendar
-          initial={start ? moment(start) : null}
-          selected={start ? moment(start) : null}
-          selectedEnd={end ? moment(end) : null}
-          onChange={(start, end) => {
-            if (end == null) {
-              this.setState({ start, end });
-            } else {
-              this.props.setValue(serializeDateRangeValue({ start, end }));
-            }
-          }}
-        />
-      </div>
+      <Calendar
+        initial={start ? moment(start) : null}
+        selected={start ? moment(start) : null}
+        selectedEnd={end ? moment(end) : null}
+        onChange={(start, end) => {
+          if (end == null) {
+            this.setState({ start, end });
+          } else {
+            this.props.setValue(serializeDateRangeValue({ start, end }));
+          }
+        }}
+      />
     );
   }
 }
diff --git a/frontend/src/metabase/parameters/components/widgets/DateSingleWidget.jsx b/frontend/src/metabase/parameters/components/widgets/DateSingleWidget.jsx
index 158697ba4c8b648c538d1e240fa45509b02948e7..357330443a5faccff5ffe8dda76757614e946f40 100644
--- a/frontend/src/metabase/parameters/components/widgets/DateSingleWidget.jsx
+++ b/frontend/src/metabase/parameters/components/widgets/DateSingleWidget.jsx
@@ -6,18 +6,16 @@ import moment from "moment";
 const DateSingleWidget = ({ value, setValue, onClose }) => {
   value = value ? moment(value) : moment();
   return (
-    <div className="p1">
-      <Calendar
-        initial={value}
-        selected={value}
-        selectedEnd={value}
-        isRangePicker={false}
-        onChange={value => {
-          setValue(value);
-          onClose();
-        }}
-      />
-    </div>
+    <Calendar
+      initial={value}
+      selected={value}
+      selectedEnd={value}
+      isRangePicker={false}
+      onChange={value => {
+        setValue(value);
+        onClose();
+      }}
+    />
   );
 };
 
diff --git a/frontend/test/metabase/components/__snapshots__/Calendar.unit.spec.js.snap b/frontend/test/metabase/components/__snapshots__/Calendar.unit.spec.js.snap
index ad327b33cdebb545b81631777fd690706908def4..4e49895009d244ed4d2c840a97c524516adb3f5d 100644
--- a/frontend/test/metabase/components/__snapshots__/Calendar.unit.spec.js.snap
+++ b/frontend/test/metabase/components/__snapshots__/Calendar.unit.spec.js.snap
@@ -2,13 +2,13 @@
 
 exports[`Calendar should render correctly 1`] = `
 <div
-  className="Calendar Grid-cell"
+  className="Calendar"
 >
   <div
-    className="Calendar-header flex align-center"
+    className="Calendar-header flex align-center border-bottom"
   >
     <div
-      className="bordered rounded p1 cursor-pointer transition-border border-hover px1"
+      className="cursor-pointer text-brand-hover"
       onClick={[Function]}
     >
       <svg
@@ -26,16 +26,14 @@ exports[`Calendar should render correctly 1`] = `
     <span
       className="flex-full"
     />
-    <h4
-      className="cursor-pointer rounded p1"
-    >
+    <h4>
       January 2018
     </h4>
     <span
       className="flex-full"
     />
     <div
-      className="bordered border-hover rounded p1 transition-border cursor-pointer px1"
+      className="cursor-pointer text-brand-hover"
       onClick={[Function]}
     >
       <svg
@@ -97,43 +95,43 @@ exports[`Calendar should render correctly 1`] = `
       className="Calendar-week"
     >
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--week-start"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--week-start"
         onClick={[Function]}
       >
         31
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--selected"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--selected"
         onClick={[Function]}
       >
         1
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         2
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         3
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         4
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         5
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-end"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-end"
         onClick={[Function]}
       >
         6
@@ -143,43 +141,43 @@ exports[`Calendar should render correctly 1`] = `
       className="Calendar-week"
     >
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-start"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-start"
         onClick={[Function]}
       >
         7
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         8
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         9
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         10
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         11
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--today Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--today Calendar-day--this-month"
         onClick={[Function]}
       >
         12
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-end"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-end"
         onClick={[Function]}
       >
         13
@@ -189,43 +187,43 @@ exports[`Calendar should render correctly 1`] = `
       className="Calendar-week"
     >
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-start"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-start"
         onClick={[Function]}
       >
         14
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         15
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         16
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         17
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         18
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         19
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-end"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-end"
         onClick={[Function]}
       >
         20
@@ -235,43 +233,43 @@ exports[`Calendar should render correctly 1`] = `
       className="Calendar-week"
     >
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-start"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-start"
         onClick={[Function]}
       >
         21
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         22
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         23
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         24
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         25
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         26
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-end"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-end"
         onClick={[Function]}
       >
         27
@@ -281,43 +279,43 @@ exports[`Calendar should render correctly 1`] = `
       className="Calendar-week"
     >
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-start"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month Calendar-day--week-start"
         onClick={[Function]}
       >
         28
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         29
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         30
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--this-month"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--this-month"
         onClick={[Function]}
       >
         31
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered"
+        className="Calendar-day cursor-pointer text-centered"
         onClick={[Function]}
       >
         1
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered"
+        className="Calendar-day cursor-pointer text-centered"
         onClick={[Function]}
       >
         2
       </span>
       <span
-        className="Calendar-day p1 cursor-pointer text-centered Calendar-day--week-end"
+        className="Calendar-day cursor-pointer text-centered Calendar-day--week-end"
         onClick={[Function]}
       >
         3