The date should be 19 to 24 January.
Probably around January 14.
Roughly April 11th
April to early may.
Your sentence structure is flawed.
Around the 29th of january
January 21st.
round about the 2nd may 2010
On or around the 6th of April.
~5 January, give or take.
Roughly January 12th
Around April 14, 2008
Somewhere around January 10