diff --git a/Makefile b/Makefile
index fbca22e..a6a79ca 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ postgres.schemadump:
 	-v --dbname="koitodb" -f "/tmp/dump/schema.sql"
 
 postgres.run:
-	docker run --name koito-db -p 5432:5432 -e POSTGRES_PASSWORD=secret -d postgres
+	docker run --name koito-db -p 5432:5432 -e POSTGRES_PASSWORD=secret -e TZ=America/New_York -d postgres
 
 postgres.run-scratch:
 	docker run --name koito-scratch -p 5433:5432 -e POSTGRES_PASSWORD=secret -d postgres
diff --git a/db/queries/listen.sql b/db/queries/listen.sql
index fc8c502..cba443a 100644
--- a/db/queries/listen.sql
+++ b/db/queries/listen.sql
@@ -4,7 +4,7 @@ VALUES ($1, $2, $3, $4)
 ON CONFLICT DO NOTHING;
 
 -- name: GetLastListensPaginated :many
-SELECT 
+SELECT
   l.*,
   t.title AS track_title,
   t.release_id AS release_id,
@@ -16,31 +16,31 @@ ORDER BY l.listened_at DESC
 LIMIT $3 OFFSET $4;
 
 -- name: GetLastListensFromArtistPaginated :many
-SELECT 
+SELECT
   l.*,
   t.title AS track_title,
   t.release_id AS release_id,
   get_artists_for_track(t.id) AS artists
 FROM listens l
 JOIN tracks_with_title t ON l.track_id = t.id
-JOIN artist_tracks at ON t.id = at.track_id 
+JOIN artist_tracks at ON t.id = at.track_id
 WHERE at.artist_id = $5
   AND l.listened_at BETWEEN $1 AND $2
 ORDER BY l.listened_at DESC
 LIMIT $3 OFFSET $4;
 
 -- name: GetFirstListenFromArtist :one
-SELECT 
+SELECT
   l.*
 FROM listens l
 JOIN tracks_with_title t ON l.track_id = t.id
-JOIN artist_tracks at ON t.id = at.track_id 
+JOIN artist_tracks at ON t.id = at.track_id
 WHERE at.artist_id = $1
 ORDER BY l.listened_at ASC
 LIMIT 1;
 
 -- name: GetLastListensFromReleasePaginated :many
-SELECT 
+SELECT
   l.*,
   t.title AS track_title,
   t.release_id AS release_id,
@@ -53,7 +53,7 @@ ORDER BY l.listened_at DESC
 LIMIT $3 OFFSET $4;
 
 -- name: GetFirstListenFromRelease :one
-SELECT 
+SELECT
   l.*
 FROM listens l
 JOIN tracks t ON l.track_id = t.id
@@ -62,7 +62,7 @@ ORDER BY l.listened_at ASC
 LIMIT 1;
 
 -- name: GetLastListensFromTrackPaginated :many
-SELECT 
+SELECT
   l.*,
   t.title AS track_title,
   t.release_id AS release_id,
@@ -75,7 +75,7 @@ ORDER BY l.listened_at DESC
 LIMIT $3 OFFSET $4;
 
 -- name: GetFirstListenFromTrack :one
-SELECT 
+SELECT
   l.*
 FROM listens l
 JOIN tracks t ON l.track_id = t.id
@@ -83,6 +83,13 @@ WHERE t.id = $1
 ORDER BY l.listened_at ASC
 LIMIT 1;
 
+-- name: GetFirstListen :one
+SELECT
+  *
+FROM listens
+ORDER BY listened_at ASC
+LIMIT 1;
+
 -- name: CountListens :one
 SELECT COUNT(*) AS total_count
 FROM listens l
@@ -138,20 +145,27 @@ WHERE l.listened_at BETWEEN $1 AND $2
 
 -- name: ListenActivity :many
 WITH buckets AS (
-  SELECT generate_series($1::timestamptz, $2::timestamptz, $3::interval) AS bucket_start
+  SELECT
+    d::date AS bucket_start_date,
+    (d + $3::interval)::date AS bucket_end_date
+  FROM generate_series(
+    $1::date,
+    $2::date,
+    $3::interval
+  ) AS d
 ),
 bucketed_listens AS (
   SELECT
-    b.bucket_start,
+    b.bucket_start_date::timestamptz,
     COUNT(l.listened_at) AS listen_count
   FROM buckets b
   LEFT JOIN listens l
-    ON l.listened_at >= b.bucket_start
-    AND l.listened_at < b.bucket_start + $3::interval
-  GROUP BY b.bucket_start
-  ORDER BY b.bucket_start
+    ON l.listened_at >= b.bucket_start_date::timestamptz
+    AND l.listened_at < b.bucket_end_date::timestamptz
+  GROUP BY b.bucket_start_date
+  ORDER BY b.bucket_start_date
 )
-SELECT * FROM bucketed_listens;
+SELECT bucketed_listens.bucket_start_date::timestamptz, listen_count FROM bucketed_listens;
 
 -- name: ListenActivityForArtist :many
 WITH buckets AS (
diff --git a/engine/handlers/get_listen_activity.go b/engine/handlers/get_listen_activity.go
index 86cf71a..0e3526c 100644
--- a/engine/handlers/get_listen_activity.go
+++ b/engine/handlers/get_listen_activity.go
@@ -19,7 +19,7 @@ func GetListenActivityHandler(store db.DB) func(w http.ResponseWriter, r *http.R
 
 		rangeStr := r.URL.Query().Get("range")
 		_range, err := strconv.Atoi(rangeStr)
-		if err != nil {
+		if err != nil && rangeStr != "" {
 			l.Debug().AnErr("error", err).Msg("GetListenActivityHandler: Invalid range parameter")
 			utils.WriteError(w, "invalid range parameter", http.StatusBadRequest)
 			return
@@ -27,7 +27,7 @@ func GetListenActivityHandler(store db.DB) func(w http.ResponseWriter, r *http.R
 
 		monthStr := r.URL.Query().Get("month")
 		month, err := strconv.Atoi(monthStr)
-		if err != nil {
+		if err != nil && monthStr != "" {
 			l.Debug().AnErr("error", err).Msg("GetListenActivityHandler: Invalid month parameter")
 			utils.WriteError(w, "invalid month parameter", http.StatusBadRequest)
 			return
@@ -35,7 +35,7 @@ func GetListenActivityHandler(store db.DB) func(w http.ResponseWriter, r *http.R
 
 		yearStr := r.URL.Query().Get("year")
 		year, err := strconv.Atoi(yearStr)
-		if err != nil {
+		if err != nil && yearStr != "" {
 			l.Debug().AnErr("error", err).Msg("GetListenActivityHandler: Invalid year parameter")
 			utils.WriteError(w, "invalid year parameter", http.StatusBadRequest)
 			return
@@ -43,7 +43,7 @@ func GetListenActivityHandler(store db.DB) func(w http.ResponseWriter, r *http.R
 
 		artistIdStr := r.URL.Query().Get("artist_id")
 		artistId, err := strconv.Atoi(artistIdStr)
-		if err != nil {
+		if err != nil && artistIdStr != "" {
 			l.Debug().AnErr("error", err).Msg("GetListenActivityHandler: Invalid artist ID parameter")
 			utils.WriteError(w, "invalid artist ID parameter", http.StatusBadRequest)
 			return
@@ -51,7 +51,7 @@ func GetListenActivityHandler(store db.DB) func(w http.ResponseWriter, r *http.R
 
 		albumIdStr := r.URL.Query().Get("album_id")
 		albumId, err := strconv.Atoi(albumIdStr)
-		if err != nil {
+		if err != nil && albumIdStr != "" {
 			l.Debug().AnErr("error", err).Msg("GetListenActivityHandler: Invalid album ID parameter")
 			utils.WriteError(w, "invalid album ID parameter", http.StatusBadRequest)
 			return
@@ -59,7 +59,7 @@ func GetListenActivityHandler(store db.DB) func(w http.ResponseWriter, r *http.R
 
 		trackIdStr := r.URL.Query().Get("track_id")
 		trackId, err := strconv.Atoi(trackIdStr)
-		if err != nil {
+		if err != nil && trackIdStr != "" {
 			l.Debug().AnErr("error", err).Msg("GetListenActivityHandler: Invalid track ID parameter")
 			utils.WriteError(w, "invalid track ID parameter", http.StatusBadRequest)
 			return
diff --git a/internal/db/psql/listen_activity.go b/internal/db/psql/listen_activity.go
index 47b1a13..1953766 100644
--- a/internal/db/psql/listen_activity.go
+++ b/internal/db/psql/listen_activity.go
@@ -8,6 +8,7 @@ import (
 	"github.com/gabehf/koito/internal/db"
 	"github.com/gabehf/koito/internal/logger"
 	"github.com/gabehf/koito/internal/repository"
+	"github.com/jackc/pgx/v5/pgtype"
 )
 
 func (d *Psql) GetListenActivity(ctx context.Context, opts db.ListenActivityOpts) ([]db.ListenActivityItem, error) {
@@ -88,8 +89,8 @@ func (d *Psql) GetListenActivity(ctx context.Context, opts db.ListenActivityOpts
 		l.Debug().Msgf("Fetching listen activity for %d %s(s) from %v to %v",
 			opts.Range, opts.Step, t1.Format("Jan 02, 2006 15:04:05"), t2.Format("Jan 02, 2006 15:04:05"))
 		rows, err := d.q.ListenActivity(ctx, repository.ListenActivityParams{
-			Column1: t1,
-			Column2: t2,
+			Column1: pgtype.Date{Time: t1, Valid: true},
+			Column2: pgtype.Date{Time: t2, Valid: true},
 			Column3: stepToInterval(opts.Step),
 		})
 		if err != nil {
@@ -98,7 +99,7 @@ func (d *Psql) GetListenActivity(ctx context.Context, opts db.ListenActivityOpts
 		listenActivity = make([]db.ListenActivityItem, len(rows))
 		for i, row := range rows {
 			t := db.ListenActivityItem{
-				Start:   row.BucketStart,
+				Start:   row.BucketedListensBucketStartDate,
 				Listens: row.ListenCount,
 			}
 			listenActivity[i] = t
diff --git a/internal/repository/listen.sql.go b/internal/repository/listen.sql.go
index 027873a..d3ff0c8 100644
--- a/internal/repository/listen.sql.go
+++ b/internal/repository/listen.sql.go
@@ -190,12 +190,32 @@ func (q *Queries) DeleteListen(ctx context.Context, arg DeleteListenParams) erro
 	return err
 }
 
+const getFirstListen = `-- name: GetFirstListen :one
+SELECT
+  track_id, listened_at, client, user_id
+FROM listens
+ORDER BY listened_at ASC
+LIMIT 1
+`
+
+func (q *Queries) GetFirstListen(ctx context.Context) (Listen, error) {
+	row := q.db.QueryRow(ctx, getFirstListen)
+	var i Listen
+	err := row.Scan(
+		&i.TrackID,
+		&i.ListenedAt,
+		&i.Client,
+		&i.UserID,
+	)
+	return i, err
+}
+
 const getFirstListenFromArtist = `-- name: GetFirstListenFromArtist :one
-SELECT 
+SELECT
   l.track_id, l.listened_at, l.client, l.user_id
 FROM listens l
 JOIN tracks_with_title t ON l.track_id = t.id
-JOIN artist_tracks at ON t.id = at.track_id 
+JOIN artist_tracks at ON t.id = at.track_id
 WHERE at.artist_id = $1
 ORDER BY l.listened_at ASC
 LIMIT 1
@@ -214,7 +234,7 @@ func (q *Queries) GetFirstListenFromArtist(ctx context.Context, artistID int32)
 }
 
 const getFirstListenFromRelease = `-- name: GetFirstListenFromRelease :one
-SELECT 
+SELECT
   l.track_id, l.listened_at, l.client, l.user_id
 FROM listens l
 JOIN tracks t ON l.track_id = t.id
@@ -236,7 +256,7 @@ func (q *Queries) GetFirstListenFromRelease(ctx context.Context, releaseID int32
 }
 
 const getFirstListenFromTrack = `-- name: GetFirstListenFromTrack :one
-SELECT 
+SELECT
   l.track_id, l.listened_at, l.client, l.user_id
 FROM listens l
 JOIN tracks t ON l.track_id = t.id
@@ -258,14 +278,14 @@ func (q *Queries) GetFirstListenFromTrack(ctx context.Context, id int32) (Listen
 }
 
 const getLastListensFromArtistPaginated = `-- name: GetLastListensFromArtistPaginated :many
-SELECT 
+SELECT
   l.track_id, l.listened_at, l.client, l.user_id,
   t.title AS track_title,
   t.release_id AS release_id,
   get_artists_for_track(t.id) AS artists
 FROM listens l
 JOIN tracks_with_title t ON l.track_id = t.id
-JOIN artist_tracks at ON t.id = at.track_id 
+JOIN artist_tracks at ON t.id = at.track_id
 WHERE at.artist_id = $5
   AND l.listened_at BETWEEN $1 AND $2
 ORDER BY l.listened_at DESC
@@ -325,7 +345,7 @@ func (q *Queries) GetLastListensFromArtistPaginated(ctx context.Context, arg Get
 }
 
 const getLastListensFromReleasePaginated = `-- name: GetLastListensFromReleasePaginated :many
-SELECT 
+SELECT
   l.track_id, l.listened_at, l.client, l.user_id,
   t.title AS track_title,
   t.release_id AS release_id,
@@ -391,7 +411,7 @@ func (q *Queries) GetLastListensFromReleasePaginated(ctx context.Context, arg Ge
 }
 
 const getLastListensFromTrackPaginated = `-- name: GetLastListensFromTrackPaginated :many
-SELECT 
+SELECT
   l.track_id, l.listened_at, l.client, l.user_id,
   t.title AS track_title,
   t.release_id AS release_id,
@@ -457,7 +477,7 @@ func (q *Queries) GetLastListensFromTrackPaginated(ctx context.Context, arg GetL
 }
 
 const getLastListensPaginated = `-- name: GetLastListensPaginated :many
-SELECT 
+SELECT
   l.track_id, l.listened_at, l.client, l.user_id,
   t.title AS track_title,
   t.release_id AS release_id,
@@ -676,31 +696,38 @@ func (q *Queries) InsertListen(ctx context.Context, arg InsertListenParams) erro
 
 const listenActivity = `-- name: ListenActivity :many
 WITH buckets AS (
-  SELECT generate_series($1::timestamptz, $2::timestamptz, $3::interval) AS bucket_start
+  SELECT
+    d::date AS bucket_start_date,
+    (d + $3::interval)::date AS bucket_end_date
+  FROM generate_series(
+    $1::date,
+    $2::date,
+    $3::interval
+  ) AS d
 ),
 bucketed_listens AS (
   SELECT
-    b.bucket_start,
+    b.bucket_start_date::timestamptz,
     COUNT(l.listened_at) AS listen_count
   FROM buckets b
   LEFT JOIN listens l
-    ON l.listened_at >= b.bucket_start
-    AND l.listened_at < b.bucket_start + $3::interval
-  GROUP BY b.bucket_start
-  ORDER BY b.bucket_start
+    ON l.listened_at >= b.bucket_start_date::timestamptz
+    AND l.listened_at < b.bucket_end_date::timestamptz
+  GROUP BY b.bucket_start_date
+  ORDER BY b.bucket_start_date
 )
-SELECT bucket_start, listen_count FROM bucketed_listens
+SELECT bucketed_listens.bucket_start_date::timestamptz, listen_count FROM bucketed_listens
 `
 
 type ListenActivityParams struct {
-	Column1 time.Time
-	Column2 time.Time
+	Column1 pgtype.Date
+	Column2 pgtype.Date
 	Column3 pgtype.Interval
 }
 
 type ListenActivityRow struct {
-	BucketStart time.Time
-	ListenCount int64
+	BucketedListensBucketStartDate time.Time
+	ListenCount                    int64
 }
 
 func (q *Queries) ListenActivity(ctx context.Context, arg ListenActivityParams) ([]ListenActivityRow, error) {
@@ -712,7 +739,7 @@ func (q *Queries) ListenActivity(ctx context.Context, arg ListenActivityParams)
 	var items []ListenActivityRow
 	for rows.Next() {
 		var i ListenActivityRow
-		if err := rows.Scan(&i.BucketStart, &i.ListenCount); err != nil {
+		if err := rows.Scan(&i.BucketedListensBucketStartDate, &i.ListenCount); err != nil {
 			return nil, err
 		}
 		items = append(items, i)
diff --git a/internal/utils/utils.go b/internal/utils/utils.go
index 905ab41..eb56425 100644
--- a/internal/utils/utils.go
+++ b/internal/utils/utils.go
@@ -127,6 +127,12 @@ func DateRange(week, month, year int) (time.Time, time.Time, error) {
 	return start, end, nil
 }
 
+// Returns a time.Time that represents the first moment of the day of t.
+func BeginningOfDay(t time.Time) time.Time {
+	year, month, day := t.Date()
+	return time.Date(year, month, day, 0, 0, 0, 0, t.Location())
+}
+
 // CopyFile copies a file from src to dst. If src and dst files exist, and are
 // the same, then return success. Otherise, attempt to create a hard link
 // between the two files. If that fail, copy the file contents from src to dst.