In an effort to clean-up our tags several groups of tags have been identified as needing review to bring consistency to their use. At the top of that list is the time frame related tags.
Previously a Q&A discussion took place on how we tag century time frames but what has also become common is tagging by decades as well as we have other date related tags out there like date, calendar, double-date that have also had discussions around like Double-Date and Events.
Right now our time frame tags exist for Centuries 19th-century, some specific Decades 1860s, as some well as some specific events like wwi, us-civil-war, and napoleonic-war that occurred during specific well-known time periods. This has made some tags redundant and added to the problem of tags becoming inconsistent.
Such as Records for US Civil War having 19th-century, us-civil-ear but not a tag for 1860s, and most us-civil-war records have no date tag at all on them. Comparing to some questions for wwii those are both tagged 1940s as well as 20th-century in addition to WWII.
The question we are trying to resolve is how should time frames be tagged, as we have already agreed upon that we want to tag them similar to History.SE using 20th-century as well as 1930s; we just are not doing it consistently.
To Note: By looking at History.SE's tags, they do not appear to associate date tags to specific events with defined timeframes like WWII. They do seem to however tag decade AND century fairly consistently if the decade and century are known. They do have a general calendar tag, but have it defined as only between switching between Chinese, Julian, Arabic, Gregorian calendars and is not that heavily used in a site significantly larger than ours.
We need to answer the following on date / time frame tags:
If tagging it with decade tags, what should be our community guideline before the decade tags are removed and just the century tag used? (i.e. Max 2)
How many is a reasonable number of date related tags per question,for example there are questions that are tags with 4 tags that all imply the date, as well there are events that spanned more than two decades or centuries?
Should we continue to use generic date, calendar, double-date when almost all of these are questions related to specific time periods, usually around the Julian the Gregorian calendar switch in Europe and to specific groups that had their own know time periods for transitioning between the two?