1. The problem is to calculate the time period by adding approximately 30 years to a birth range of 6–4 BCE. 2. Important rule: When adding years across BCE to CE, remember there is no year 0; 1 BCE is immediately followed by 1 CE. 3. Convert the birth years to a timeline: 6 BCE to 4 BCE means 6 and 4 years before year 1 CE. 4. Adding 30 years to 6 BCE: $$-6 + 30 = 24$$ CE (since negative numbers represent BCE and positive CE). 5. Adding 30 years to 4 BCE: $$-4 + 30 = 26$$ CE. 6. Therefore, the time period after adding 30 years to the birth range 6–4 BCE is approximately 24–26 CE. 7. The user's estimate of 27–29 CE is slightly off by about 3 years; the correct range is 24–26 CE.