diff --git a/src/requests.md b/src/requests.md
index e37c5bd..549de47 100644
--- a/src/requests.md
+++ b/src/requests.md
@@ -170,7 +170,10 @@ function requestsByLanguageTimeline({ width } = {}) {
     x: {
       label: '',
       domain: chosenYear
-        ? [new Date(chosenYear, 0, 1, 0, 0, 0, 0), new Date(chosenYear + 1, 0, 1, 0, 0, 0, 0)]
+        ? [
+            d3.utcSunday.floor(new Date(chosenYear, 0, 1, 0, 0, 0, 0)),
+            d3.utcSunday.ceil(new Date(chosenYear + 1, 0, 1, 0, 0, 0, 0)),
+          ]
         : [d3.utcSunday.floor(firstRequest), d3.utcSunday.ceil(now)],
     },
     marks: [
diff --git a/src/users.md b/src/users.md
index 022e197..6524bef 100644
--- a/src/users.md
+++ b/src/users.md
@@ -89,7 +89,7 @@ function usersTimeline({ width } = {}) {
             d3.utcSunday.floor(new Date(chosenYear, 0, 1, 0, 0, 0, 0)),
             d3.utcSunday.ceil(new Date(chosenYear + 1, 0, 1, 0, 0, 0, 0)),
           ]
-        : [d3.utcSunday.floor(firstUser), d3.utcSunday.ceil(now)],
+        : [d3.utcMonth.floor(firstUser), d3.utcMonth.ceil(now)],
     },
     marks: [
       Plot.rectY(