Here are the ones that bloomed before Stella de Oro for me last year. I've added several that are supposed to bloom before Stella that should bloom for me this year, so I may have a longer list by the end of the month. Of course, it's been really cold here so I'm thinking the whole daylily season will start later here. Hopefully I'm wrong, but I don't think so.
Early Bird (VT), Dip, Olallie Unreg, May15
Gold Dust, Dip, Yeld, May 25
Bitsy, Dip, Warner, May 25
Cheerful Thought, Tet, Burkey, May 26
Earlybird Orangeade, Tet, Skinner, June 3
04-019-05 BES x Gold Dust, Dip, Seedling, June 3
04-019-04 BES x Gold Dust, Dip, Seedling, June 5
Earlybird Sunshine, Tet, Skinner, June 6
04-019-03 BES x Gold Dust, Dip, Seedling June 9