Merge pull request #385 from simonbaird/sameday_tz_fix

Fix timezone related filter test failure
Also fix timezone related eachday test failure

At UTC +600 the modified timestmap for 'TiddlerOne' and 'Tiddler
Three' are on the same day hence the eachday test fails.

Similar to the fix commit 8487221, this just adjusts the timestamp
to ensure the test passes in any timezone.