A friendly reminder regarding spoilers! At present the expanded Trek universe is in a period of major upheaval with the continuations of Discovery and Prodigy, the advent of new eras in gaming with the Star Trek Adventures RPG, Star Trek: Infinite and Star Trek Online, as well as other post-57th Anniversary publications such as the ongoing IDW Star Trek comic and spin-off Star Trek: Defiant. Therefore, please be courteous to other users who may not be aware of current developments by using the {{spoiler}}, {{spoilers}} OR {{majorspoiler}} tags when adding new information from sources less than six months old (even if it is minor info). Also, please do not include details in the summary bar when editing pages and do not anticipate making additions relating to sources not yet in release. THANK YOU
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| Timeline | |
| Decades: | 1910s - 1920s - 1930s - 1940s - 1950s - 1960s - 1970s (stardates -1/40 to -1/49) |
| Centuries: | 19th century - 20th century - 21st century |
The 1940s was, on Earth's calendar, the fifth decade of the 20th century. Although this was a time period before Human formulation of stardates, the reference stardate system has delineated this era ranging from stardate -1/40 to stardate -1/49.