Unity 3D Releases history with release dates

Hi,

Can someone help me with finding the release history of Unity 3D along with release dates?

Thanks,
Venu

Release dates for the various versions of the Unity editor:

http://docs.unity3d.com/Manual/ReleaseDates.html

Editor Version Release Dates

Below are the release dates for the various versions of the Unity editor.

Version  Date
4.3.4	29 January 2014
4.3.3	13 January 2014
4.3.2	18 December 2013
4.3.1	28 November 2013
4.3.0	6 September 2013
4.2.1	2 September 2013
4.2.0	22 July 2013
4.1.5	7 June 2013
4.1.4	6 June 2013
4.1.3	27 May 2013
4.1.2	21 March 2013
4.1.0	14 March 2013
4.0.1	11 January 2013
4.0.0	14 November 2012
3.5.7	13 December 2012
3.5.6	8 September 2012
3.5.5	8 August 2012
3.5.4	1 August 2012
3.5.3	22 June 2012
3.5.2	15 May 2012
3.5.1	2 March 2012
3.5.0	14 February 2012
3.4.2	5 November 2011
3.4.1	20 September 2011
3.4.0	26 July 2011
3.3.0	1 March 2011
3.2.0	10 February 2011
3.0.0	27 September 2010
2.6.1	2 December 2009
2.6.0	28 October 2009
2.5.0	18 March 2009
2.1.0	24 July 2008
2.0.2	30 January 2008
2.0.1	5 November 2007
2.0.0	10 October 2007
1.6.2	1 May 2007
1.6.1	30 January 2007
1.6.0	28 November 2006
1.5.1	27 September 2006
1.5.0	16 June 2006
1.2.2	29 March 2006
1.2.1	17 January 2006
1.2.0	21 December 2005
1.1.1	26 September 2005
1.1.0	23 August 2005
1.0.4	15 July 2005
1.0.3	13 July 2005
1.0.2	6 July 2005
1.0.1	30 June 2005
1.0.0	6 June 2005

Unity iPhone

Originally, the iOS build target was provided by a separate version of the editor, Unity iPhone, but this feature was integrated into the main editor in Unity 3.0. The release dates for Unity iPhone versions are given below.

Version  Date
1.7.0	2 April 2010
1.6.0	4 March 2010
1.5.1	20 November 2009
1.5.0	25 August 2009
1.0.3	17 June 2009
1.0.2	27 April 2009
1.0.1	16 December 2008
1.0.0	3 October 2008

The accepted answer is great but Unity discontinued that list as of 4.3.4. The best way to find the release dates now is through their download archive.
https://unity3d.com/get-unity/download/archive

Unity 1 (MacOS only): Apple Developer Conference, June 2005

Unity 2 (MacOS only): October 2007 (28 months)

Unity 3: September 2010 (34 months)

Unity 4: November 2012 (26 months)

Unity 5: Not yet released in Aug 2014 (at least 21 months)

Average time between paid upgrades: 29.3 months

http://unity3d.com/company/public-relations/press-releases