1) The Gemara tells us that the Beis Hamikdash continued burning until sunset of the tenth of Av. Therefore, the restrictions of the Three Weeks and the Nine Days apply until noon of the tenth of Av. (M.B. 558:5) Therefore, one should not eat meat or drink wine until the noon after Tisha B’Av. Bathing, haircuts, washing clothes and music is also prohibit. (M.B. 2) [Regarding Havdallah, some permit drinking wine while others advise to use beer or chamar medina- for normative halacha, a rav should be consulted.]
2) Rav Shimon Eider zt”l (Halachos of the Three Weeks page 32) writes the following, “When Tisha B’Av falls on Shabbos and is postponed until Sunday [as is the case this year], eating meat and drinking wine is permissible Monday morning. On Sunday evening, however, it is prohibited … since the day was spent in mourning, it is not proper to assume conduct of simcha (i.e. eating meat and drinking wine) immediately after it is over. Bathing, washing clothing and haircuts are permissible Sunday evening. Music is not permitted until the morning.” Harav Gavriel Zinner shlit”a and Harav Herschel Schachter shlit”a, however, permit music on Sunday evening as well. (Netai Gavriel page 553)
ציון במשפט תפדה ושביה בצדקה
Halachablog 