diff --git a/integrations/api_comment_test.go b/integrations/api_comment_test.go
index d21f56aaf..2c754272e 100644
--- a/integrations/api_comment_test.go
+++ b/integrations/api_comment_test.go
@@ -7,6 +7,7 @@ package integrations
 import (
 	"fmt"
 	"net/http"
+	"net/url"
 	"testing"
 
 	"code.gitea.io/gitea/models"
@@ -25,18 +26,40 @@ func TestAPIListRepoComments(t *testing.T) {
 	repoOwner := models.AssertExistsAndLoadBean(t, &models.User{ID: repo.OwnerID}).(*models.User)
 
 	session := loginUser(t, repoOwner.Name)
-	req := NewRequestf(t, "GET", "/api/v1/repos/%s/%s/issues/comments",
-		repoOwner.Name, repo.Name)
+	link, _ := url.Parse(fmt.Sprintf("/api/v1/repos/%s/%s/issues/comments", repoOwner.Name, repo.Name))
+	req := NewRequest(t, "GET", link.String())
 	resp := session.MakeRequest(t, req, http.StatusOK)
 
 	var apiComments []*api.Comment
 	DecodeJSON(t, resp, &apiComments)
+	assert.Len(t, apiComments, 2)
 	for _, apiComment := range apiComments {
 		c := &models.Comment{ID: apiComment.ID}
 		models.AssertExistsAndLoadBean(t, c,
 			models.Cond("type = ?", models.CommentTypeComment))
 		models.AssertExistsAndLoadBean(t, &models.Issue{ID: c.IssueID, RepoID: repo.ID})
 	}
+
+	//test before and since filters
+	query := url.Values{}
+	before := "2000-01-01T00:00:11+00:00" //unix: 946684811
+	since := "2000-01-01T00:00:12+00:00"  //unix: 946684812
+	query.Add("before", before)
+	link.RawQuery = query.Encode()
+	req = NewRequest(t, "GET", link.String())
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	DecodeJSON(t, resp, &apiComments)
+	assert.Len(t, apiComments, 1)
+	assert.EqualValues(t, 2, apiComments[0].ID)
+
+	query.Del("before")
+	query.Add("since", since)
+	link.RawQuery = query.Encode()
+	req = NewRequest(t, "GET", link.String())
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	DecodeJSON(t, resp, &apiComments)
+	assert.Len(t, apiComments, 1)
+	assert.EqualValues(t, 3, apiComments[0].ID)
 }
 
 func TestAPIListIssueComments(t *testing.T) {
diff --git a/models/fixtures/comment.yml b/models/fixtures/comment.yml
index 864313cac..bd64680c8 100644
--- a/models/fixtures/comment.yml
+++ b/models/fixtures/comment.yml
@@ -13,6 +13,7 @@
   issue_id: 1 # in repo_id 1
   content: "good work!"
   created_unix: 946684811
+  updated_unix: 946684811
 -
   id: 3
   type: 0 # comment
@@ -20,6 +21,7 @@
   issue_id: 1 # in repo_id 1
   content: "meh..."
   created_unix: 946684812
+  updated_unix: 946684812
 -
   id: 4
   type: 21 # code comment
@@ -63,4 +65,4 @@
   review_id: 10
   tree_path: "README.md"
   created_unix: 946684812
-  invalidated: true
\ No newline at end of file
+  invalidated: true
diff --git a/models/issue_comment.go b/models/issue_comment.go
index 9caab1dc4..8f54d9656 100644
--- a/models/issue_comment.go
+++ b/models/issue_comment.go
@@ -782,6 +782,7 @@ type FindCommentsOptions struct {
 	IssueID  int64
 	ReviewID int64
 	Since    int64
+	Before   int64
 	Type     CommentType
 }
 
@@ -799,6 +800,9 @@ func (opts *FindCommentsOptions) toConds() builder.Cond {
 	if opts.Since > 0 {
 		cond = cond.And(builder.Gte{"comment.updated_unix": opts.Since})
 	}
+	if opts.Before > 0 {
+		cond = cond.And(builder.Lte{"comment.updated_unix": opts.Before})
+	}
 	if opts.Type != CommentTypeUnknown {
 		cond = cond.And(builder.Eq{"comment.type": opts.Type})
 	}
diff --git a/routers/api/v1/repo/issue_comment.go b/routers/api/v1/repo/issue_comment.go
index 3085c2e51..8c9793620 100644
--- a/routers/api/v1/repo/issue_comment.go
+++ b/routers/api/v1/repo/issue_comment.go
@@ -7,11 +7,11 @@ package repo
 import (
 	"errors"
 	"net/http"
-	"time"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
 	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/routers/api/v1/utils"
 	comment_service "code.gitea.io/gitea/services/comments"
 )
 
@@ -43,16 +43,21 @@ func ListIssueComments(ctx *context.APIContext) {
 	//   in: query
 	//   description: if provided, only comments updated since the specified time are returned.
 	//   type: string
+	//   format: date-time
+	// - name: before
+	//   in: query
+	//   description: if provided, only comments updated before the provided time are returned.
+	//   type: string
+	//   format: date-time
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/CommentList"
 
-	var since time.Time
-	if len(ctx.Query("since")) > 0 {
-		since, _ = time.Parse(time.RFC3339, ctx.Query("since"))
+	before, since, err := utils.GetQueryBeforeSince(ctx)
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError, "GetQueryBeforeSince", err)
+		return
 	}
-
-	// comments,err:=models.GetCommentsByIssueIDSince(, since)
 	issue, err := models.GetIssueByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
 	if err != nil {
 		ctx.Error(http.StatusInternalServerError, "GetRawIssueByIndex", err)
@@ -62,7 +67,8 @@ func ListIssueComments(ctx *context.APIContext) {
 
 	comments, err := models.FindComments(models.FindCommentsOptions{
 		IssueID: issue.ID,
-		Since:   since.Unix(),
+		Since:   since,
+		Before:  before,
 		Type:    models.CommentTypeComment,
 	})
 	if err != nil {
@@ -105,18 +111,26 @@ func ListRepoIssueComments(ctx *context.APIContext) {
 	//   in: query
 	//   description: if provided, only comments updated since the provided time are returned.
 	//   type: string
+	//   format: date-time
+	// - name: before
+	//   in: query
+	//   description: if provided, only comments updated before the provided time are returned.
+	//   type: string
+	//   format: date-time
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/CommentList"
 
-	var since time.Time
-	if len(ctx.Query("since")) > 0 {
-		since, _ = time.Parse(time.RFC3339, ctx.Query("since"))
+	before, since, err := utils.GetQueryBeforeSince(ctx)
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError, "GetQueryBeforeSince", err)
+		return
 	}
 
 	comments, err := models.FindComments(models.FindCommentsOptions{
 		RepoID: ctx.Repo.Repository.ID,
-		Since:  since.Unix(),
+		Since:  since,
+		Before: before,
 		Type:   models.CommentTypeComment,
 	})
 	if err != nil {
diff --git a/templates/swagger/v1_json.tmpl b/templates/swagger/v1_json.tmpl
index de774de9f..a2baac136 100644
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@@ -3196,9 +3196,17 @@
           },
           {
             "type": "string",
+            "format": "date-time",
             "description": "if provided, only comments updated since the provided time are returned.",
             "name": "since",
             "in": "query"
+          },
+          {
+            "type": "string",
+            "format": "date-time",
+            "description": "if provided, only comments updated before the provided time are returned.",
+            "name": "before",
+            "in": "query"
           }
         ],
         "responses": {
@@ -3652,9 +3660,17 @@
           },
           {
             "type": "string",
+            "format": "date-time",
             "description": "if provided, only comments updated since the specified time are returned.",
             "name": "since",
             "in": "query"
+          },
+          {
+            "type": "string",
+            "format": "date-time",
+            "description": "if provided, only comments updated before the provided time are returned.",
+            "name": "before",
+            "in": "query"
           }
         ],
         "responses": {