My sources for dates above are
DKiG from
Horst Scheibert, "Die Träger des Deutschen Kreuzes in Gold: Kriegsmarine, Luftwaffe, Waffen-SS und Des Deutschen Kreuzes in Silber Heer, Kriegsmarine, Luftwaffe, Waffen-SS," Podzun-Pallas Verlag, Hanau am Main, no printed publication date but I got it new in 1987.
Ehrenpokal from
Horst Scheibert, "Die Träger der Ehrenblattspange des Heeres und der Waffen-SS, Die Träger der Ehrentafelspange der Kriegsmarine, Die Inhaber des Ehrenpokals für Besondere Leistung im Luftkrieg," Podzun-Pallas Verlag, 1986
I have noted on seeing documents for German Crosses and Honor Goblets that the listed dates in these books are those of PUBLICATION of the award, NOT the earlier actual PRESENTATION date often found on documents and the Honor Goblets themselves.
DKiG from
Horst Scheibert, "Die Träger des Deutschen Kreuzes in Gold: Kriegsmarine, Luftwaffe, Waffen-SS und Des Deutschen Kreuzes in Silber Heer, Kriegsmarine, Luftwaffe, Waffen-SS," Podzun-Pallas Verlag, Hanau am Main, no printed publication date but I got it new in 1987.
Ehrenpokal from
Horst Scheibert, "Die Träger der Ehrenblattspange des Heeres und der Waffen-SS, Die Träger der Ehrentafelspange der Kriegsmarine, Die Inhaber des Ehrenpokals für Besondere Leistung im Luftkrieg," Podzun-Pallas Verlag, 1986
I have noted on seeing documents for German Crosses and Honor Goblets that the listed dates in these books are those of PUBLICATION of the award, NOT the earlier actual PRESENTATION date often found on documents and the Honor Goblets themselves.
Unfortunately, the one of the infamous "group splitters" got to it first 
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