If you're referring to the 10 days login attached to the top right corner if your login days, then those are part of the monthly login campaign. For instance, the one that just ended was for 61st month of the game running. Once March comes, there will be another one celebrating 62nd month of the game, etc etc.
That's thoses ones. If another one came normally after this event it's okay. I was afraid they just stopped it.

Are we going to do a thread for the 6 star tix?
Why not. A special 6* ticket pact is a nice idea.

And so that free 6 star ticket, I guess kind of like what we got before (a similar ticket last yr I think?)
The only 6* ticket we got (at least since I'm playing) was for mobile version celebration.
Last year we got one but it was a 55x gacha reward on Bath Fennel event.
And the last one we got was a choose your waifu 2015 6*ticket.

It's random but any free 6* is nice anyway.