diff --git a/README.md b/README.md
index 773e4c5..caaec80 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,9 @@ Join link: [Google meet](https://meet.google.com/jyx-mxnq-kpk)
 
 ## 2025 4Q meetup list
 
-- [265th, 2025-12-13](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/504), will be open
+- [267th, 2025-12-27](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/511), joined 3
+- [266th, 2025-12-20](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/508), joined 3
+- [265th, 2025-12-13](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/504), joined 3
 - [264th, 2025-12-06](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/502), joined 3
 - [263th, 2025-11-29](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/499), joined 2
 - [262th, 2025-11-22](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496), joined 5
@@ -472,9 +474,9 @@ and participate more than 30 online meetup, get the chicken gifticon.
 
 |Ranking|Name|Count|
 |-------|----|-----|
-|1|[Kim Jong Feel](https://github.com/jongfeel/)|49|
-|2|[최지윤](https://github.com/chichoon/)|37|
-|3|[Yeshin Lee](https://github.com/yeslee-v/)|29|
+|1|[Kim Jong Feel](https://github.com/jongfeel/)|50|
+|2|[최지윤](https://github.com/chichoon/)|38|
+|3|[Yeshin Lee](https://github.com/yeslee-v/)|30|
 |4|[hyuncho](https://github.com/aquamagic9)|14|
 |5|[junmokang](https://github.com/moaoh)|12|
 |6|[Byeongguk Ahn](https://github.com/nonoaa/)|11|
@@ -491,9 +493,9 @@ and participate more than 30 online meetup, get the chicken gifticon.
 
 |Ranking|Name|Count|
 |-------|----|-----|
-|1|[jongfeel](https://github.com/jongfeel/)|260|
-|2|[최지윤](https://github.com/chichoon)|171|
-|3|[yeslee-v](https://github.com/yeslee-v/)|101|
+|1|[jongfeel](https://github.com/jongfeel/)|261|
+|2|[최지윤](https://github.com/chichoon)|172|
+|3|[yeslee-v](https://github.com/yeslee-v/)|102|
 |4|[Jeongan Lee](https://github.com/fkdl0048/)|51|
 |5|[TaeWon](https://github.com/ytw9699/)|44|
 |6|[Byeongguk Ahn](https://github.com/nonoaa/)|37|
diff --git a/Stamp/README.md b/Stamp/README.md
index e1237c6..0ab71b3 100644
--- a/Stamp/README.md
+++ b/Stamp/README.md
@@ -26,10 +26,10 @@
 
 | Name | 10-04 (255th) | 10-11 (256th) | 10-18 (257th) | 10-25 (258th) | 11-01 (259th) | 11-08 (260th) | 11-15 (261th) | 11-22 (262th) | 11-29 (263th) | 12-06 (264th) | [12-13 (265th)](https://github.com/ThinkAboutSoftware/HomeComingDay/issues/54) | 12-20 (266th) | 12-27 (267th) |
 |-|-|-|-|-|-|-|-|-|-|-|-|-|-|
-| [Kim Jong Feel](https://github.com/jongfeel/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3354690077"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3417653581"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/487#issuecomment-3417662398"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/488#issuecomment-3448026193"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/490#issuecomment-3528076229"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/493#issuecomment-3528085599"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/494#issuecomment-3535401050"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496#issuecomment-3565258161"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/499#issuecomment-3590820497"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/502#issuecomment-3619198670"><img src="approved.png"/></a> | 
-| [Yeshin Lee](https://github.com/yeslee-v/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3365649496"><img src="approved.png"/>book 10/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3392740659"><img src="approved.png"/>book 11/20</a> | | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/493#issuecomment-3505553882"><img src="approved.png"/><img src="Starbucks_iceamericano.png"/><img src="approved.png"/>book 12/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/494#issuecomment-3533014937"><img src="approved.png"/><img src="approved.png"/>book 13/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496#issuecomment-3552778236"><img src="approved.png"/><img src="Starbucks_americano.JPG"/>book 14/20</a> | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/502#issuecomment-3619160162"><img src="approved.png"/><img src="approved.png"/>book 15/20</a> | 
+| [Kim Jong Feel](https://github.com/jongfeel/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3354690077"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3417653581"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/487#issuecomment-3417662398"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/488#issuecomment-3448026193"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/490#issuecomment-3528076229"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/493#issuecomment-3528085599"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/494#issuecomment-3535401050"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496#issuecomment-3565258161"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/499#issuecomment-3590820497"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/502#issuecomment-3619198670"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/504#issuecomment-3623892807"><img src="approved.png"/></a> | 
+| [Yeshin Lee](https://github.com/yeslee-v/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3365649496"><img src="approved.png"/>book 10/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3392740659"><img src="approved.png"/>book 11/20</a> | | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/493#issuecomment-3505553882"><img src="approved.png"/><img src="Starbucks_iceamericano.png"/><img src="approved.png"/>book 12/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/494#issuecomment-3533014937"><img src="approved.png"/><img src="approved.png"/>book 13/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496#issuecomment-3552778236"><img src="approved.png"/><img src="Starbucks_americano.JPG"/>book 14/20</a> | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/502#issuecomment-3619160162"><img src="approved.png"/><img src="approved.png"/>book 15/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/504#issuecomment-3648723923"><img src="approved.png"/><img src="approved.png"/><img src="Starbucks_americano.JPG"/>book 16/20</a> | 
+| [최지윤](https://github.com/chichoon) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3367729284"><img src="approved.png"/>book 9/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3392719783"><img src="approved.png"/>book 10/20</a> | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/490#issuecomment-3475295170"><img src="approved.png"/>book 11/20</a> | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/490#issuecomment-3475295170"><img src="approved.png"/><img src="Starbucks_americano.JPG"/><img src="approved.png"/>book 12/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496#issuecomment-3565242024"><img src="approved.png"/>book 13/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/499#issuecomment-3588086178"><img src="approved.png"/><img src="approved.png"/><img src="Starbucks_americano.JPG"/>book 14/20</a> | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/504#issuecomment-3648715659"><img src="approved.png"/><img src="approved.png"/>book 15/20</a> | 
 | [ARi](https://github.com/hyunhyee/) | | | | | | | | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/502#issuecomment-3619219417"><img src="approved.png"/><img src="approved.png"/>book 1/20</a> | 
-| [최지윤](https://github.com/chichoon) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3367729284"><img src="approved.png"/>book 9/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3392719783"><img src="approved.png"/>book 10/20</a> | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/490#issuecomment-3475295170"><img src="approved.png"/>book 11/20</a> | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/490#issuecomment-3475295170"><img src="approved.png"/><img src="Starbucks_americano.JPG"/><img src="approved.png"/>book 12/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496#issuecomment-3565242024"><img src="approved.png"/>book 13/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/499#issuecomment-3588086178"><img src="approved.png"/><img src="approved.png"/><img src="Starbucks_americano.JPG"/>book 14/20</a> | 
 | [Ahyun Lee](https://github.com/northmantar/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3365375011"><img src="approved.png"/>book 5/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3390448143"><img src="approved.png"/>book 6/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/487#issuecomment-3417564009"><img src="approved.png"/><img src="Starbucks_iceamericano.png"/><img src="approved.png"/>book 7/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/488#issuecomment-3445432741"><img src="approved.png"/><img src="approved.png"/>book 8/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/490#issuecomment-3475344362"><img src="approved.png"/><img src="Starbucks_iceamericano.png"/>book 9/20</a> | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496#issuecomment-3565410819"><img src="approved.png"/>book 10/20</a> | 
 | [kimpitang](https://github.com/kimpitang/) | | | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/490#issuecomment-3475337878"><img src="approved.png"/>book 4/20</a> | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/496#issuecomment-3565244146"><img src="approved.png"/>book 5/20</a> | 
 | [Byeongguk Ahn](https://github.com/nonoaa/) | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/487#issuecomment-3417760608"><img src="approved.png"/><img src="approved.png"/>book 17/20</a> |