1st millennium Millennia: 1st millennium BC · 1st millennium AD · 2nd millennium AD Centuries: 1st century · 2nd century · 3rd century · 4th century · 5th century · 6th century · 7th century · 8th century · 9th century · 10th century The 1st millennium was a period of time from January 1, 1 A.D. to December 31, 1000 A.D. Centuries and decades[change | change source] 1st century 0s 10s 20s 30s 40s 50s 60s 70s 80s 90s 2nd century 100s 110s 120s 130s 140s 150s 160s 170s 180s 190s 3rd century 200s 210s 220s 230s 240s 250s 260s 270s 280s 290s 4th century 300s 310s 320s 330s 340s 350s 360s 370s 380s 390s 5th century 400s 410s 420s 430s 440s 450s 460s 470s 480s 490s 6th century 500s 510s 520s 530s 540s 550s 560s 570s 580s 590s 7th century 600s 610s 620s 630s 640s 650s 660s 670s 680s 690s 8th century 700s 710s 720s 730s 740s 750s 760s 770s 780s 790s 9th century 800s 810s 820s 830s 840s 850s 860s 870s 880s 890s 10th century 900s 910s 920s 930s 940s 950s 960s 970s 980s 990s vteMillenniaCE / AD 1st 2nd 3rd far future BCE / BC 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th prehistory natural history