1 Start-date, another year on March 14th (2-3)
2 Flyer time (5)
3 Turn tin around (4)
4 Historically, berry cured SARS (6)
5 Constant speed of light? That's awesome! (4)
6 Winged creature's over skull bone and crosses (9)
7 Salt spread over pig-like mammal (5)
10 Number taken from article in a round-about way (5)
13 Irrational character? (2)
14 Cuttlefish found in ocean (5)
15 Theme involved in rising trigonometric function (5)
17 Old giant is somehow making amends (9)
19 Alternatively, new flower (5)
22 Copyright, perhaps, is up (1,1)
23 Instruments made using years of Portuguese (6)
24 Wedding without A-list model (3-2)
26 Fine a forest giraffe (5)
27 Team starts encouraging fairy (5)
28 Way around bar (4)
29 Lines up for a dose of medicine (4)