diff --git a/devel/210_17.md b/devel/210_17.md
new file mode 100644
index 00000000..85b265b6
--- /dev/null
+++ b/devel/210_17.md
@@ -0,0 +1,15 @@
+# [210_17] srfi-19 date-week-day 和 date-week-number 添加测试
+
+## 添加 srfi-19 date-week-day 和 date-week-number 添加测试
+
+## 如何测试
+
+```shell
+# 可能需要清除缓存
+# rm .xmake/ build/ -r
+xmake f -vyD
+xmake b goldfish
+./bin/goldfish tests/goldfish/liii/time-test.scm
+```
+
+
diff --git a/goldfish/srfi/srfi-19.scm b/goldfish/srfi/srfi-19.scm
index 23815a27..7fde8c4b 100644
--- a/goldfish/srfi/srfi-19.scm
+++ b/goldfish/srfi/srfi-19.scm
@@ -75,6 +75,7 @@
     date-nanosecond date-second date-minute date-hour
     date-day        date-month  date-year   date-zone-offset
     date-year-day
+    date-week-day date-week-number
     ;; Time/Date/Julian Day/Modified Julian Day Converters
     time-utc->date date->time-utc
     ;; Date to String/String to Date Converters
diff --git a/tests/goldfish/liii/time-test.scm b/tests/goldfish/liii/time-test.scm
index b769406d..d021e9a3 100644
--- a/tests/goldfish/liii/time-test.scm
+++ b/tests/goldfish/liii/time-test.scm
@@ -808,6 +808,26 @@ wrong-type-arg
   (check (date-year-day d4) => 365)
   (check (date-year-day d5) => 366))
 
+;; Test date-week-day
+(let ((d1 (make-date 0 0 0 0 1 1 1970 0))   ; 1970-01-01 Thu
+      (d2 (make-date 0 0 0 0 25 12 2023 0)) ; 2023-12-25 Mon
+      (d3 (make-date 0 0 0 0 29 2 2024 0))) ; 2024-02-29 Thu
+  (check (date-week-day d1) => 4)
+  (check (date-week-day d2) => 1)
+  (check (date-week-day d3) => 4))
+
+;; Test date-week-number (ignore first partial week)
+(let ((d1 (make-date 0 0 0 0 4 1 1970 0))   ; 1970-01-04 Sun
+      (d2 (make-date 0 0 0 0 11 1 1970 0))  ; 1970-01-11 Sun
+      (d3 (make-date 0 0 0 0 5 1 1970 0))   ; 1970-01-05 Mon
+      (d4 (make-date 0 0 0 0 12 1 1970 0))  ; 1970-01-12 Mon
+      (d5 (make-date 0 0 0 0 31 12 2024 0)))
+  (check (date-week-number d1 0) => 0)
+  (check (date-week-number d2 0) => 1)
+  (check (date-week-number d3 1) => 0)
+  (check (date-week-number d4 1) => 1)
+  (check (date-week-number d5 1) => 52))
+
 ;; Test error conditions
 (check-catch 'wrong-type-arg (date-nanosecond "not-a-date"))
 (check-catch 'wrong-type-arg (date-second 123))