转载别人的。
void datetest()

{

wxDateTime now=wxDateTime::Now();

wxString date1=now.Format();

wxString date2=now.Format(wxT("%X"));

wxString date3=now.Format(wxT("%x"));

//下面代码只显示日期部分

cout<<"wxDateTime now=wxDateTime::Now():"<<wxDateTime::Now().FormatDate()<<endl;

cout<<"now.Format():"<<date1<<endl;//日期时间

cout<<"now.Format(wxT(\"%X\")):"<<date2<<endl;//时间

cout<<"now.Format(wxT(\"%x\")):"<<date3<<endl;//日期

//有趣的ParseDateTime()

cout<<"\n\nwxDateTime::ParseDateTime():"<<endl;

//tomorrow 是什么日子？

cout<<"tomorrow:"<<endl;

wxDateTime tomorrow;

tomorrow.ParseDateTime(wxT("tomorrow 11:00am"));

cout<<"Tomorrow is "<<tomorrow.Format()<<endl;

//五一又是什么日子？

cout<<"The Labor Day test:"<<endl;

wxDateTime laborday;

laborday.ParseDate(wxT("May 1st"));

cout<<"The Labor Day is "<<laborday.Format()<<endl;

//至于wxDateSpan,用法非常直白，仅举一例，顺便一提Format的另一种格式：

wxDateSpan span(,);

wxDateTime then=now.Add(span);

cout<<then.Format(wxT("%B %d %Y"))<<endl;

}

     wxDateTime now=wxDateTime::Now();

     wxString date = now.Format(wxT("%Y-%m-%d"),wxDateTime::A_EST);

 wxdatetime和wxstring互换

 wxstring to wxdatetime:

 char* ca = "2008-09-03";

 wxDateTime dt;dt.ParseDate(ca);