Event based advertisement selection

A method for selecting an advertisement (ad) to display in an ad spot, comprising:

• accessing a database documenting a plurality of categories, each including at least one event item having geographical coordinates, an event occurrence time parameter and at least one descriptive parameter;
• receiving at least one theme definition selected for an advertising campaign;
• matching between said theme definition and at least one relevant category from said plurality of categories;
• assigning an ad from said advertising campaign to said at least one relevant category according to said matching;
• receiving a message indicative of a location of a user at a specific time from a client terminal associated with said user;
• finding an event item corresponding to said location and time;
• selecting an ad from said at least one relevant category which includes said corresponding event item;
• and
• sending said client terminal a response to said message, said response comprising instructions to present said ad on a display of said client terminal.