In His Dark Materials, Lyra comes from a world where Catholicism and Protestantism apparently merged into one mega church that continues to exert great control over all aspects of life even into the modern era (e.g. the observatory that Lee Scoresby visits in The Subtle Knife has a church representative present to make sure no heretical discoveries get out). Will comes from our world, circa 1997.
Is Lyra's world also circa 1997, in whatever calendar they used? The social and technological level in her world seems to be at the World War I level; they have zeppelins but apparently no airplanes, naphtha gaslights are still widespread despite the existence of anbaric (electric) lighting, there are no refrigerators (Lyra is shocked to see the one in Cittagazze at the start of The Subtle Knife), there don't seem to be any automobiles, and most of the world seems to still be ruled by large Western empires. Will's world, on the other hand, is our familiar world of blue jeans, feminism, physics, and Windows 95. Is Lyra's world actually at an earlier time than Will's world, or do they both exist circa 1997, with Lyra's world being less advanced because of the influence of the church? More broadly, is every world in the multiverse also circa 1997?