We are planning to upgrade form JIRA 4.3.4 to JIRA 6.1.7 based on our requirements.We would like to know the approximate End of Support date for JIRA 6.1 and JIRA 6.2.So that we can decide on to which version we want to upgrade.Please let us know as soon as possible.
I'd say you should aim for 6.3 anyway.
But see https://confluence.atlassian.com/display/Support/Atlassian+Support+End+of+Life+Policy
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