In some case you want a special combinaison of function

With user function you can make a special function only for your need.

Separate each function with a semi colon ;

S1 Separator (space) S21 Separator (space space) in next version

S2 Separator / (slash)

S3 Separator : (colonn)

S4 Separator . (period) S24 Separator .. (period period) in next version

S5 Separator - (hyphen) S25 Separator -- (hyphen hyphen) in next version

S6 Separator , (comma)

DD Day numeric format example 25

DS Day short character format example Mon

DL Day Long character format example Monday

MM Month numeric format example 12

MS Month short character format example Sep

ML Month long character format example September

QU quantieme numeric format with a prefix depends of you language example D009 in english or J009 in french

SU for Sun UP (Sunrise)

SD for Sun Down (Sunset)

SM for Time for next solar event format is HH:MM

SU2 for Next Sunrise

WK Week of year numeric format with a prefix depends of you language example W25 in english or S25 in french

W+ Same as WK with + 1 (A special development for Craig) example W26 if WK=W25

W- Same as WK with - 1 (A special development for Craig) example W24 if WK=W25

YY year numeric format example 2021

Y year numeric (only 2 last numbers) format example 21