The number days from 13^{th} May, 2005 to 18^{rd} August 2005 ( both inclusive)

From 13^{th} May to to 31^{st} May = 19 days |

June = 30 days |

July = 31 days |

From 1^{st} August to 19^{th} August = 19 days |

Total number of days = 99 days |

The number of odd days = (14 x 7 days )+1 = 99

So there is 1 odd day in the given period.