You can decode your Mavic Serial Number using the tool: http://tools.retroroms.info/

Here is the format, you look at the 5th, 6th and 7th item.

Ex : 08QDxxx ……..

• 5th -^ = YEAR
• 6TH –^ = MONTH
• 7TH —^ = DAY

YEAR

• D = 2016
• E = 2017
• F = 2018

MONTH

• 1 = January
• 2 = February
• 3 = March
• 4 = April
• 5 = May
• 6 = June
• 7 = July
• 8 = August
• 9 = September
• A = October
• B = November
• C = December

DAY (base36) (base10)

• 1 = 1
• 2 = 2
• 3 = 3
• 4 = 4
• 5 = 5
• 6 = 6
• 7 = 7
• 8 = 8
• 9 = 9
• A = 10
• B = 11
• C = 12
• D = 13
• E = 14
• F = 15
• G = 16
• H = 17
• I = NOT Used as I and 1 can be confused.
• J = 18
• K = 19
• L = 20
• M = 21
• N = 22
• O = NOT Used as O and 0 can be confused.
• P = 23
• Q = 24
• R = 25
• S = 26
• T = 27
• U = 28
• V = 29
• W = 30
• X = 31

credits to Logger at mavicpilots