diff --git a/internal/database/comment.go b/internal/database/comment.go
index 54780cb5127..9ebd2d1de8e 100644
--- a/internal/database/comment.go
+++ b/internal/database/comment.go
@@ -434,9 +434,14 @@ func loadCommentsAttributes(e Engine, comments []*Comment) (err error) {
 	return nil
 }
 
-func getCommentsByIssueIDSince(e Engine, issueID, since int64) ([]*Comment, error) {
+func getCommentsByIssueIDSince(e Engine, issueID, since int64, isAsc bool) ([]*Comment, error) {
 	comments := make([]*Comment, 0, 10)
-	sess := e.Where("issue_id = ?", issueID).Asc("created_unix")
+	sess := e.Where("issue_id = ?", issueID)
+	if isAsc {
+		sess.Asc("created_unix")
+	} else {
+		sess.Desc("created_unix")
+	}
 	if since > 0 {
 		sess.And("updated_unix >= ?", since)
 	}
@@ -447,9 +452,14 @@ func getCommentsByIssueIDSince(e Engine, issueID, since int64) ([]*Comment, erro
 	return comments, loadCommentsAttributes(e, comments)
 }
 
-func getCommentsByRepoIDSince(e Engine, repoID, since int64) ([]*Comment, error) {
+func getCommentsByRepoIDSince(e Engine, repoID, since int64, isAsc bool) ([]*Comment, error) {
 	comments := make([]*Comment, 0, 10)
-	sess := e.Where("issue.repo_id = ?", repoID).Join("INNER", "issue", "issue.id = comment.issue_id").Asc("comment.created_unix")
+	sess := e.Where("issue.repo_id = ?", repoID).Join("INNER", "issue", "issue.id = comment.issue_id")
+	if isAsc {
+		sess.Asc("comment.created_unix")
+	} else {
+		sess.Desc("comment.created_unix")
+	}
 	if since > 0 {
 		sess.And("comment.updated_unix >= ?", since)
 	}
@@ -459,23 +469,25 @@ func getCommentsByRepoIDSince(e Engine, repoID, since int64) ([]*Comment, error)
 	return comments, loadCommentsAttributes(e, comments)
 }
 
-func getCommentsByIssueID(e Engine, issueID int64) ([]*Comment, error) {
-	return getCommentsByIssueIDSince(e, issueID, -1)
+func getCommentsByIssueID(e Engine, issueID int64, isAsc bool) ([]*Comment, error) {
+	return getCommentsByIssueIDSince(e, issueID, -1, isAsc)
 }
 
-// GetCommentsByIssueID returns all comments of an issue.
-func GetCommentsByIssueID(issueID int64) ([]*Comment, error) {
-	return getCommentsByIssueID(x, issueID)
+// GetCommentsByIssueID returns all comments of an issue, sorted by created time.
+func GetCommentsByIssueID(issueID int64, isAsc bool) ([]*Comment, error) {
+	return getCommentsByIssueID(x, issueID, isAsc)
 }
 
-// GetCommentsByIssueIDSince returns a list of comments of an issue since a given time point.
-func GetCommentsByIssueIDSince(issueID, since int64) ([]*Comment, error) {
-	return getCommentsByIssueIDSince(x, issueID, since)
+// GetCommentsByIssueIDSince returns a list of comments of an issue since a given time point, sorted
+// by created time.
+func GetCommentsByIssueIDSince(issueID, since int64, isAsc bool) ([]*Comment, error) {
+	return getCommentsByIssueIDSince(x, issueID, since, isAsc)
 }
 
-// GetCommentsByRepoIDSince returns a list of comments for all issues in a repo since a given time point.
-func GetCommentsByRepoIDSince(repoID, since int64) ([]*Comment, error) {
-	return getCommentsByRepoIDSince(x, repoID, since)
+// GetCommentsByRepoIDSince returns a list of comments for all issues in a repo since a given time
+// point, sorted by created time.
+func GetCommentsByRepoIDSince(repoID, since int64, isAsc bool) ([]*Comment, error) {
+	return getCommentsByRepoIDSince(x, repoID, since, isAsc)
 }
 
 // UpdateComment updates information of comment.
diff --git a/internal/database/issue.go b/internal/database/issue.go
index 18cdef1531a..800a820dda0 100644
--- a/internal/database/issue.go
+++ b/internal/database/issue.go
@@ -152,7 +152,7 @@ func (issue *Issue) loadAttributes(e Engine) (err error) {
 	}
 
 	if issue.Comments == nil {
-		issue.Comments, err = getCommentsByIssueID(e, issue.ID)
+		issue.Comments, err = getCommentsByIssueID(e, issue.ID, true)
 		if err != nil {
 			return fmt.Errorf("getCommentsByIssueID [%d]: %v", issue.ID, err)
 		}
diff --git a/internal/route/api/v1/repo/issue_comment.go b/internal/route/api/v1/repo/issue_comment.go
index a816daad641..bfd5813c618 100644
--- a/internal/route/api/v1/repo/issue_comment.go
+++ b/internal/route/api/v1/repo/issue_comment.go
@@ -13,9 +13,13 @@ import (
 	"gogs.io/gogs/internal/database"
 )
 
+// ListIssueComments list comments on an issue.
 func ListIssueComments(c *context.APIContext) {
+	// Initialize a variable to hold the "since" time
 	var since time.Time
+	// Check if the "since" query parameter is provided
 	if len(c.Query("since")) > 0 {
+		// Attempt to parse the "since" value as a time in RFC3339 format
 		var err error
 		since, err = time.Parse(time.RFC3339, c.Query("since"))
 		if err != nil {
@@ -24,29 +28,46 @@ func ListIssueComments(c *context.APIContext) {
 		}
 	}
 
-	// comments,err:=db.GetCommentsByIssueIDSince(, since)
+	// Retrieve the raw issue by its index
 	issue, err := database.GetRawIssueByIndex(c.Repo.Repository.ID, c.ParamsInt64(":index"))
+	// If an error occurs, return an error response
 	if err != nil {
 		c.Error(err, "get raw issue by index")
 		return
 	}
 
-	comments, err := database.GetCommentsByIssueIDSince(issue.ID, since.Unix())
+	// Initialize a boolean variable to determine the sort order
+	var isAsc bool = true
+	// Check if the "is_asc" query parameter is set to "false"
+	if c.Query("is_asc") == "false" {
+		// If so, set the sort order to descending
+		isAsc = false
+	}
+
+	// Retrieve comments for the issue since a given time
+	comments, err := database.GetCommentsByIssueIDSince(issue.ID, since.Unix(), isAsc)
+	// If an error occurs, return an error response
 	if err != nil {
 		c.Error(err, "get comments by issue ID")
 		return
 	}
 
+	// Create a slice of API comments to hold the formatted comments
 	apiComments := make([]*api.Comment, len(comments))
+	// Iterate over the comments and format them for the API
 	for i := range comments {
 		apiComments[i] = comments[i].APIFormat()
 	}
+	// Return the formatted comments as a JSON response
 	c.JSONSuccess(&apiComments)
 }
 
+// ListRepoIssueComments list comments for a given repo.
 func ListRepoIssueComments(c *context.APIContext) {
 	var since time.Time
+	// Check if the "since" query parameter is provided
 	if len(c.Query("since")) > 0 {
+		// Attempt to parse the "since" value as a time in RFC3339 format
 		var err error
 		since, err = time.Parse(time.RFC3339, c.Query("since"))
 		if err != nil {
@@ -55,7 +76,16 @@ func ListRepoIssueComments(c *context.APIContext) {
 		}
 	}
 
-	comments, err := database.GetCommentsByRepoIDSince(c.Repo.Repository.ID, since.Unix())
+	// Initialize a boolean variable to determine the sort order
+	var isAsc bool = true
+	// Check if the "is_asc" query parameter is set to "false"
+	if c.Query("is_asc") == "false" {
+		// If so, set the sort order to descending
+		isAsc = false
+	}
+
+	// Retrieve comments for the repository since a given time
+	comments, err := database.GetCommentsByRepoIDSince(c.Repo.Repository.ID, since.Unix(), isAsc)
 	if err != nil {
 		c.Error(err, "get comments by repository ID")
 		return