日期：first sunday of april
开始：。
这个节日在各国庆祝 (+1):
俄罗斯.Geologists Day在其他年份
| 开始日期 | |
|---|---|
| Geologists Day 2456 | |
| Geologists Day 2457 | |
| Geologists Day 2458 | |
| Geologists Day 2459 | |
| Geologists Day 2460 | |
| Geologists Day 2461 |
日期：first sunday of april
开始：。
| 开始日期 | |
|---|---|
| Geologists Day 2456 | |
| Geologists Day 2457 | |
| Geologists Day 2458 | |
| Geologists Day 2459 | |
| Geologists Day 2460 | |
| Geologists Day 2461 |