even mobage screws up on this topic, the new cards came out last night but the news info said the 4th

Its possible they use 2 different time zones. All the events are based on ET, but the developers are probably using something like Japan Time Zone (GMT +9)

yeah most likely just funny how the notice says the 4th and i have the new rare in my present list still that says i got it on the 3rd

For the new cards released in packs, I've been using the date the publish, like the 4th for this last round.  For the rewards I'm just putting the date they are posted.

I changed some of the anniversary ones to the day they were given out and would continue unless you want to keep them the way they are when the whole anniversary thing was announced

I guess it depends, can we see the details of the card at all? or is it just that small image on the anniversary page. 

Its similar to all the rewards from events. They are announcement before they are given out. However  you can normal see more of the info about it.

no info at all is given, only the name and alignment due to the photo. usually they reveal new cards before the event starts with no info then give info when the event begins and then give them out once the event is done, in that case you can usually put either the middle or end part cause we at least know the stats and ability

actually if you click on the card you can see its info but not all

if i click on them now i only get an image of them only, i think if i used to click on them it would be like clicking on a card on My Page and it only has the quote

yeah you just get the quote. forgetting what things are called lol