Das ist zwar ein Beleg für den 5. Sonntag, trotzdem finde ich, dass die Festlegung auf "fifth Sunday after Easter" gestrichen werden sollte. Wenn sich der Eintrag auf den Namen des Festes (und einen eher unbestimmten Zeitraum) beschränkt, muss man sich über Terminfragen keine Gedanken machen. Beim Fronleichnamsfest ist auch kein genauer Termin eingetragen, und das ist gut so, denn es wurde z.B. in Italien von einem Donnerstag auf einen Sonntag verlegt.

Ich meine, man könnte auch den Zusatz "(nach Ostern)" weglassen, da es ja nur einen Rogate-Sonntag gibt.

As the countries, including our own, became more industrialized and less agrarian, we have seen a lessening of the celebration of Rogation—and we are the worse for it. Our “new” Episcopal Book of Common Prayer of 1979 sneakily de-emphasized Rogation Days and Rogation Sunday, as they were annotated in the 1928 BCP.
http://stpaulsms.org/rogation-days/

Rogation Sunday
Rogation Sunday is the day when the Church has traditionally offered prayer for God’s blessings on the fruits of the earth and the labors of those who produce our food. The word “rogation” is from the Latin rogare, “to ask.” Historically, the Rogation Days (the three days before Ascension Day) were a period of fasting and abstinence, beseeching God’s blessing on the crops for a bountiful harvest. Few of us today directly derive our livelihood from the production of food, yet it is good to be reminded of our dependence upon those who do and our responsibility for the environment. A prayer for Rogation Day is found on page 258 in The Book of Common Prayer:
Almighty God, Lord of heaven and earth: We humbly pray that your gracious providence may give and preserve to our use the harvests of the land and of the seas, and may prosper all who labor to gather them, that we, who are constantly receiving good things from your hand, may always give you thanks; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever. Amen.
http://stpaulsivy.org/did-you-know-series/did...

Rogation Days are to honor God for all creation, and to pray for the land and sea and the gifts of labor, and for the needs of all. The traditional Rogation Days are the Monday, Tuesday, and Wednesday before Ascension Day and Rogation Sunday is the Sixth Sunday after Easter.
http://www.stgeorgesepiscopal.net/rogation-sunday/

In keeping with Earth Day, Shepherd of the Hills Lutheran Church will be celebrating Rogation Sunday (as well as Good Shepherd Sunday) April 22 ...
The word “Rogation” comes from the Latin verb rogare meaning “to ask,” so, on April 22 the congregation will gather, and invites the community to join in asking for God’s blessing on crops, animals and gardens, and the labors of those who produce food.
https://www.wvnews.com/garrettrepublican/comm...

(a Lutheran order of service)
http://www.synodresourcecenter.org/wma/worshi...

https://www.merriam-webster.com/dictionary/Ro...

https://www.collinsdictionary.com/dictionary/...

https://en.wikipedia.org/wiki/Rogation_days

I would support just translating the name, since capitalized as a proper name it's recognizable as a particular feast day, and leaving the explanation to something like Wikipedia, or indeed, the particular church.
But I don't have a strong opinion about it, and I really don't know if it's observed on the same Sunday in different denominations.

Indeed, the primary one seems to be in the spring in some cases, with this one considered more minor? But now some discussions mention just observing it on a day of the congregation's choice, matching the local agricultural season and/or other needs such as the timing of a stewardship campaign. You all can sort that out.

I doubt it's observed in many other English-speaking Protestant denominations, but it certainly was observed in Anglicanism in the past, and apparently some parishes are still reviving the idea and using it as a time to talk about stewardship of the environment, or at least as a theme for the collect of the day. So who knows, it may be on the upswing again in a few places.

But just in general, no, it's probably not a widely known term in English-speaking Christianity outside Catholicism and Anglicanism -- and even there, it seems to have to be explained to most modern congregations.

The day is not observed to my knowledge in US Methodism, where many congregations may not even do much for Pentecost and even fewer observe Ascension at all. I would have guessed the same was probably true for other mainline denominations like the Presbyterians, but I did find several Lutheran hits, so who knows. It may just be observed by congregations that are more high-church or liturgically oriented, depending more on the individual congregation than the denomination.

You might see if hbberlin or anyone else has anything to add. It could be more widespread than I realize.

Aber auch in Deutschland wissen die wenigstens auf Anhieb, wann Sonntag Rogate ist und was dahinter steht, wage ich zu behaupten. Den meisten wäre wohl nur sofort klar, daß es eine kirchliche Angelegenheit ist. Ich kenne die Sonntage eigentlich auch nur aus Abendmahlteilnehmerliste des 19./fr. 20. Jh. In der Zeit meines kirchlichen Engagement spielten diese Bezeichnungen keine Rolle.

Die Rogation Days sind auf D. die Bitttage: katholische Kirche Montag, Dienstag u. Mittwoch vor Christi Himmelfahrt (DWDS)

#6 definitiv. Meine #5 sollte nur hm--us' Caveat ergänzen. Der Begriff ist auch dt. Christen nicht unbedingt geläufig. Das ist sicher kein Grund, ihn nicht einzutragen. Denn geben tut es ja offensichtlich beide.