FindMyPast.com is allowing free access from today until Wednesday 6 July to a collection of more than one billion records.
The free access includes 118m travel and migration records, 112m US marriages, all US, Canadian, Irish and UK censuses, convict transportation records, plus over four hundred years of ship passenger lists from all major US ports.
More than 7m new US Naturalisation Petitions and more than 1.7million US Passport Applications and Indexes (1795-1925) have also been released, marking the first phase of two brand new collections for uncovering early immigrant ancestors.
To take advantage of the free access period, you'll need to have a registered account with FindMyPast.com and sign into that account. Registration is straightforward and doesn't require you to provide any more detail than your name, email address and country of residence. No financial information is requested.
The free access will continue until 11:59pm EST on Wednesday 6 July (this'll be 04:59am on Thursday 7 July in Dublin/London).
This offer is available only via FindMyPast.com.
A separate offer of free access to all FindMyPast's Military records plus Irish and UK censuses is available at FindMyPast.co.uk, FindMyPast.ie, and FindMyPast.com.au (see blogpost).