Jewish Holidays

One should not use fast days for leisure or for field trips. One should even refrain from performing permissible acts such as showering or cutting one's hair. If a person spends the fast indifferently, he has not properly fulfilled his obligation.

When buying oil for Chanukah, one should not say, “This oil is for Chanukah,” for some authorities hold that by making such a statement one dedicates all of the oil for Chanukah candles alone, including that which remains in the bottle after Chanukah.