Ramadan starts when the new moon is sighted

What day do you think Ramadaan in 2012 will start?

Fasting | March 30, 2014 2:04 pm
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If a sister is used to fast every Mondays and Thursdays and her husband agreed on that and she should not ask him every time she fasts,but its happened that in a morning he approach her and they have intercourse.Will Allah count a daily fast for her as she was used to do this (ie.fasting)and she only obey her husband without telling him that it is a fasting day.
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It is sunnah to take fasting on monday and thursday, if they have some invitation,do they reject because of fasting,or attend as fasting or not to take fasting on that days and eat food they serve as a part of happiness?which is better?