I am not much good at charts, but here is my attempt to show the time zone representation of the photo challenge participants. The numbers:

• UTC-10: 2
• UTC-7: 19
• UTC-6: 8
• UTC-5: 18
• UTC-4: 30
• UTC-3: 3
• UTC: 1
• UTC+1: 25
• UTC+2: 16
• UTC+3: 2
• UTC+8: 4
• UTC+9: 2
• UTC+10: 6
• UTC+12: 3